I Want My Ex Back but Idk how. Please Help.

My ex and I have been together for a little over a year, but sadly we broke up almost 5 months ago. We broke up because I was feeling ignored, unappreciated, and his father did not want us to be together. When I broke up with him, he didn’t fight for me. He just watched me leave. I didn’t think that he cared at all. We didn’t contact each other until I reached out to him 2 days ago.

Here’s how it went:
Me: Hey
Him: Who’s this?
Me: (My name). Are you (his name)?
Him: Yes
Me: Oh ok. How are you?
Him: Good. What about you?
Me: That’s good. I’m good as well.
Me: I decided to reach out cause I thought of you. I understand if you’re still mad at me.
Him: Yeah, I understand.
Me: And also I wanted to tell you that I miss you. You can ignore if you want. I just want to be honest.
Him: It’s cool.
Me: Okay cool.

Of course I expected him to respond vaguely so it’s okay. I was hurt, but I can understand why he acted that way. I broke up with him but I don’t know how he truly feels.

Honestly, I still want to be with him. Because what we had was amazing despite of our demise. The good literally outweighed the bad. I think it was just bad timing because he had a lot going on with school and other extracurricular activities that being with me was hard to do at the moment. I don’t want to continue what we left off, cause I want to start anew and leave the past behind. Before anything else, I do want to communicate about our breakup to at least bring some closure if he decides he no longer wants to be with me.