Just another ex girlfriend question,but could use your help.

Hi, My name is jay and I have been having some issues with my ex girlfriend. I could really use everyones help so please leave me some comments. First off im 26 years old and have been feeling like im a teenager(no offense to anyone) over my last ex. I was engaged about 2 1/2 years ago but we broke up after a 8 1/2 year relationship.She was my highschool sweetheart. after that it took awhile for me to get back into the dating world and had build this incredible defensive wall around my heart. I dated many women, but just didnt have any feelings for them. One day a friend asked me to go to a party w/ him and I reluctantly said yes. He tells me we are going to pick up a friend of his and then go.I didnt think much about the whole thing and we go to her house. As soon as she gets in the car I immedately say to myself” Wow!” She was just evrything I could ever hope for and 2 years of depression and that wall melted away as we talked and joked around. Needless to say we didnt get together rite away.She is young and just started college and I didnt think it was best for her. I graduated last year and am already trying to put my life together. She has so much to experience and didnt think she wanted to be tied down at her just made 20. We ended up getting together about 2 months later and it was amazing. After about a month she told me she loved me, I thought it was pretty soon for that but I honestly felt it to and was relieved when she said it. We dated for 3 months and it was great. She had a very bad childhood and has some issues with love and commitment though(which she warned me about) and shortly after she broke up with me. Didnt give me a reason but just said she wasnt ready. I left her alone and respected her desicion dispite my broken heart because I truley Love her and just want her to be happy. After about a month we both started seeing other people, but then I get a late night call from her saying she missed me and couldnt stop thinking about me. Needless to say I took her back and evrything was amazing again for about 3 weeks. Then on holloween nite she brakes up with me again over a text message. I was pissed so I didnt even answer the text and didnt speak to her for a few days. Finally I texted her and she just said she wishes the best for me. Still got no reason for the breakup. I left it alone and wished her the best and didnt even argue with her.She has dated a few people since the breakup and so have I. She keeps popping into my life every so often and I dont understand why. We have been broken up for 7 months and I still love her fiercely but I dont know what to do or if I should do anything. In march she called and asked me out and I went. We kept it casual, but during the nite she told me a lot of confusing things that I cant even begin to understand. She told me she regrets the other two guys she dated and made some mistakes in the past, but I wasnt a mistake and she doesnt regret me. She says some other stuff like that and alittle later she says That she dindt like us not talking and wants me in her life but is confused about her life and is trying to get her stuff straight and doesnt want a relationship with anyone.Why even say something like that? After about a week I decide We shouldnt talk anymore so I can get over her and we hadnt spoken for a month when she finds out Im moving and texted me. I was kinda cold about it and didnt really have any conversation and it has been another 2 months since we talked. About a week ago I texted her and she told me she didnt want to bother me so she has waited for me to contact her. Again kept it short and General. Truth is I love Her more than anything, more than I have ever loved anyone even my ex fiance. She is so confusing and has a tendency to flip flop(maybe bi-polar) but still I love her and I really do want to be with her and want her back. She is dating around and I dont know what chance I have with these other guys because she is gorgeous and can have anyone she wants. I am so scared of her rejecting me because I cant take another broken heart from her. She definately has her issues though and she dosent know what she wants,but im gonna try to get her back. Please give me your advice on how Or any advice you all have(good or bad).I appreciate the help guys!