<human>: I need help. About a couple of months ago, my girlfriend I of a year and 2 months broke up. At first, I went through the normal phases of missing her, and eventually I concluded that I was better off not with her due to how shitty she was to me. But, after going through some of our old fights I realize that often I was the shitty one. I think I grew quite a bit after the breakup and even though I have no wish to date her again, I just feel real shitty of how I acted towards her. So, I don't know if I should apologize to her for the way I was. I realize that she isn't perfect and she was shitty time to time, but after reading our old conversations and fights I think I realize how ridiculous I was and I just want to move past all that with no hard feelings. Please help.

Can you give me the gist of the text in a nutshell?
<bot>: Originally thought my ex was the shitty one till rereading old fights. Realized that I was the shitty one, and now I don't know if I should apologize to her so I can move on.