My ex

How can girls have people so far up they asses, I did everything for this girl I was there in the hardest times, when she broke up with me I got back together, when she blocked me for a bit over a week and randomly texted me like nothing ever happened, when I opened up and she got angry. She often got angry at me for the smallest things. I never ever threw my anger on her, was always nice and was like a angel to her, and she has me so far up the ass like I just slaughtered her family, I cannot understand how girls can be like this it's like she never knew me, she is soooo cold. And still after everything I think about her often and miss her, she's to only person I ever opened up to Like that and really talked to, I have a really closed sircle and don't really like meeting new people and talking about feelings, but with her it's different but what she thinks about that, that I don't know. How can girls be like this?? I wouldn't wish this on my worst enemy