How Do I Get Her To Trust Me Again

My situation is typical i guess, but it’s not a typical break up.
I’ve been dating this one girl on and off for about 3 years, we date for many months at a time, but because we’re literally complete opposites we always fight and break up for months at a time after, and go off and date other people.

We always come back to each other because we’re in love with each other, and we cant be with other people. Her and I are romantics, so we dont believe in hooking up with other people, we both have not had sex with anyone in the 3 years we’ve dated on and off, because we’re loyal to each other. Even when we’ve not dating each other, we cant stand the thought of doing it with someone else.

She’s called me drunk once and told me she still has feelings for me, even though i broke her heart really bad this last time, and was depressed for 3 months, but shes just scared to get her heart broken again, and ive told her that i love her and that i will never hurt her again. And we went to sleep together on the phone that night she called. So theres something there. I just don’t know how to get her to trust me again.

I recently did all the deadly mistakes mentioned in this guide, because i was desperate and was trying everything i could to try and get her back, and didn’t know i wasn’t supposed to do all this. But i know i want to be with her and only her for the rest of my life, so i was trying anything to get her back.

It’s not like we just broke up, we havent dated for about a year. we’ve dated other people. Shes dated one guy, which she told me she thinks was just a rebound, and ive dated others, which we’re basically rebounds for me, i dated them just to feel something, but they were all meaningless to me, no one can ever fill the gap that the girl i love can only fill.

I want to try the 30 days of no contact, but will it even work? We didnt just break up, we’re “friends”. I’ve told her i love her and cant be without her and everything, and told her that i can’t be with anyone else, and asked her if she’d take me back, and she said she doesnt know if she wants to be with me. She tells me this sober, but when shes drunk, she tells me she has feelings for me, just doesnt know if she can trust me.

Just the other day, on her birthday, she went and saw the new Coment movie, a romance, i havent seen it but supposedly its about two people who are completely different, and fight, and no matter how hard they try, cant be without each other, and she told me that the movie reminded her of me and her. It made me think that she doesnt know how to be without me, she just doesnt know how to trust me to not break her heart again.

I want to try the 30 days thing, and the text message to invite myself back into her life, but will this really work. I’ve explained my situation… will this guide actually help me, how do i get her to trust me again to not break her heart, ive hurt her for the 3rd time now, and its not just that easy for her to just say okay and date me again.. I need serious advice on what to do and how to do it.

Thanks.