<human>: Can you condense the text into three sentences or less?

So, here's the gist of the situation. Got a girl, who broke with a boy, decided she hated him, then got back together with said boy after about 2 weeks, when he came crawling back. 
The girl and I are in a close relationship, and she tried to hide the fact they were back together. Frustrated me pretty badly. I've asked why they got back together, and she said because he deserved a second chance, so I told her I didn't want to see her go through this break-up again (last time, it was quite emotional) and she said she would "deal with it". 
She's being very calloused when talking, and just kinda abrasive when we're not talking face to face (ex. texting). Last time, the guy pretty much cheated on her and called her bitchy. I've been nothing but good to her, and yet she still chooses this guy over me. I know, I sound like an egotistical jerk, but I'm really confused right now. Any help or advice would be greatly appreciated, thanks in advance. if you need more info, just comment. Thanks!
<bot>: Girl broke up with guy, guy asks to get back together and they. I like her, don't know what to do.