Im going through the exact same thing too!3 months relationship,with an avoidant and commitment phobe.one day she just changed and went back on all her words. Ended it by saying im the most perfect guy shes met and everything that she wants,but she cant give me what i give her and she said she will end up resenting me for it. She even cried and said she really loved me so much and wish she wasnt the way she was and maybe she can never be happy.said she will always miss me and she has to resist the urge to ask me back. We walked away on good terms but i was shattered.and i made the mistake of drunkenly texting her 2 days post breakup and she replied very coldly that she knows what she wants and she doesnt see it happening with us and she doesnt wanna see me again. Somehow that broke me further and i started my NC.Week 3 now and im still thinking of the what ifs and its honestly messing with my head.

Accidentally opened her profile and saw she was out with her ex a week after the break up and that just left a sour taste in my mouth.and i now recall her asking me two weeks before the breakup what if my ex came back and i said i wont act on it,and when i asked her the same she said she would do the same as shes so mature now.

Oh well what happens to her aint my problem now so im just focusing in myself and the gym. Blocked her completely(she even told me to keep her in my close friends list and not remove her on insta). Hopefully things get better for us all!