How can I get the girl back?

This girl and I were good friends before everything started, Life became very rough for me and I was preparing to seriously harm myself… We sat there and talked about it and she told me that she really liked me a lot, We dated for 1 year and 6 months after that. She made my life great and helped me get over everything. After that year and a half She broke up with me for no reason and immidiately went after another guy. (im guessing to help her get over me). Well that didn’t work out between then and she came back to me and we were trying to stay friends like we were before. But since we broke up I went straight back into the whirlpool of hell where she picked me up. She tells me all the time she still has feelings for me and I know I would give my life for her just for making my life a better place to be and showing me the world is greater then it looked to me. Lately she has changed and is saying im obsessed with her and addicted to her… I have no problem not talking to her or anything but even when I ask her how her weekend went she freaks out, until she is alone again then she turns back to happy to be around me again… I have tried to move on but it just wasent the same, she did aswell and said it wasent the same aswell but she doesn’t want anything to do with me now as a relationship. I don’t know what to do I love her with all my heart and I just want her to be back in my arms all over again… Any idea’s?

(We only broke up 6 months prior to this.)

I was thinking giving her more time and staying close by her side but I would like to see what other have to say, Thanks :)