Really don’t know what to do and quite scared

So sorry that this is long but I want to make sure I give plenty of details so I don’t screw this up. My ex and I dated for 6 months but we both had a major crush on each other for a whole year prior. We didn’t know we shared feelings at the time because I was with someone else (long story) so we considered ourselves best friends. I actually went to Europe over the summer of 2019 and he later told me that his love didn’t waver over that time. So considering that it was about 3 months of no contact and knowing I was unavailable and he didn’t give up, it convinced me that our love was strong. When we started dating, our relationship was really passionate and we never argued. The worst thing that would happen would be that one of us would get emotional about something, but those times didn’t last long at all. They’d always be fixed by reassurance or a quick apology then we’d go back to being that happy couple again. He broke with me on March 9th but it was just a normal day. I’d given him a love letter as a surprise (he was really excited and happy about it), we cuddled, held hands, and he was telling me about all the things we were going to do together in the future. It was my birthday on the 14th so he told me he was really excited to share it with me as boyfriend and girlfriend. Later that night however, I got emotional about something and that’s when he broke up with me. He said he wasn’t ready for a relationship, I was giving him migraines, I deserve better, and he wanted to make sure he never hurt me again. I only really begged for a day but just told him to think about us on other days. He told me to stop calling him and that he was going through a lot but soon he would call me, sobbing, telling me how much he loves me, but he was confused. He said he wanted space so I sent him a long text saying that I love him, hope he doesn’t give up on us, and that I’m willing to give him space. But he wouldn’t let me give him space. The next day he kept calling and texting me. I reached out to his friend and she told me that he thought I was emotional and would feel bad when I got upset. She also tried helping us out and said that he was acting strange and she knows I mean the world to him. This was over a period of a week or so. He then said he wanted to be friends so I hesitantly agreed. At first, things weren’t great. I was mostly the one initiating the conversation (they were okay). Sometimes he wouldn’t answer my calls or texts for a while. On March 21st, we were talking and then he said his friend was calling him so he hung up saying that he’ll call me after. He never did so I called him few hours later and he acted really confused. He had never forgot about me before so I guess I got upset and told him that I didn’t want to be treated as if I didn’t mean anything to him. He got angry at first but then he got sad and started to break down because he thought I didn’t want to be friends with him. He said he thought about us many times but said it wouldn’t work. I apologized then we didn’t talk for a bit. Further on, things got weird. I don’t know if he just was reacting to what I said but he started giving me mixed signals. He would call me early in the morning everyday even though he knew I was still sleeping. I would go to a coffee shop to spend time with my mom everyday around the same time and sometimes when he called me while I was at the coffee shop, I would try to tell him that I’ll call him after but he would sound upset and ask why I couldn’t just talk to him in line. One time he tried to convince me to not to go out with my mom because he wanted to talk to me. It would happen everyday. One night I ended up watching three hours worth of videos on technology over the phone (since we are quarantined) because he loves technology. Later that night, he kept telling me that he was exhausted but I didn’t try to keep him from going to sleep. He just said that he wanted to talk to me and said if I would have to be the one to hang up on him. He got kind of playful by asking if it was too hard to hang up on him. I tried playing along, telling him the same thing, but then he hung up on me and said he guesses it’s not that hard for him. However, he kept texting me and teasing me a bit. Am I overlooking these and just thinking they are good signs? When he was cold rather than hot, he would basically be having a conversation with me but wouldn’t let me add to it that much. One morning he called me, told me that he bought a $2000 ring so he can match with his sister, then ended the conversation. It was really random. For instance, I would sometimes try telling him a funny story or add an opinion/question but a lot of the times he would just continue on with what he was saying. I started searching for advice by dating coaches and the first piece of advice was to ignore him (this was a bad mistake in my opinion). I only ignored him for one and a half days but he asked if I was okay, kept calling me, then apologized because he thought I was mad at him. I felt like I was too harsh so I broke. I contacted him first and he sounded upset and asked me if I was okay literally a thousand times in like 5 minutes. The next day, he was asking me for a favor and telling me about how much he trusts and cares about me. I wanted to start a no contact rule so I tried starting a conversation about it. At first I was beating around the bush. He told me that he was scared shitless so then I told him. I said I’m unsure if we could be friends because I still really loved him and wanted to be with him. He got a mixture of angry and sad. He told me that the breakup was my fault, I pushed him away, he doesn’t trust me, I’m playing with his emotions, and I’ve never listened to him. He said he kept telling me in the relationship that I was doing this, saying he kept trying to fight for me but then gave up. But I felt like I would have noticed if he ever tried saying those things to me. He would always tell me I had no flaws and I’m the perfect girlfriend. I made the mistake of hanging up on him because I was hurting. I’m conflicted on his words. Part of me believes it and blames myself, the other part hopes that he was just being emotional because why would you want to be even friends with me if I did those things? I mean, not to add that he was literally having a convo about how much he trusts me then saying he doesn’t when he got emotional. That was on April 7th. I sent him a message the next day saying what I hope for and apologizing for hanging up on him. Got response. Told him Happy Easter but also got no response. My original plan was to do no contact for 30 days but I fear he will ignore me forever. He is a stubborn and shy guy with low confidence so I’m unsure if he’ll reach out even if he wanted to.
My questions:
Do I have a chance? He said he tried telling me many times of what I was doing so I’m worried he’ll think I can’t change or something.
Should I do no contact for 30 days or should I reach out sooner and treat him as if he’s a new guy that I’m interested in and start from step one? So try and build trust through a “friendship”, be the girl he feel in love with, show I’ve changed (I understand I was emotional and I want to work to change that), and probably be a bit flirty. I would try to do this either way but I don’t know if I should wait a long time.