get the love of my life back

I met the love of my life and waited three years just to be with him. When we were finally together, nothing went right. I ruined everything, because I had changed… It only lasted three MONTHS before I broke up with him. Now he’s all I want…
He says we’ll be together in the end… But he doesn’t want me back because I hurt him so badly… How can I prove to him we should be together?