OK.
>broke up with gf 2 months ago
>recently had sex 2 times at her place
>slept at her place
>next day she leaves for work, I go through her iPad
>finds out she's been hanging out with 2 diff. boys, kissed one of them
>about the time we first hooked up after the break up, she hung out with another guy
>talking shit about me to her girl friends
>I got really fucking upset
>Haven't mentioned anything though, been playing cool
>She texted me yesterday, wanted to hangout and have sex
>Said she was looking forward to see me
>sex is really good, she loves my cock
>litterally worships it
>I still have a little bit of feelings for her, but a lot of it dissapeared while I read this stuff
>Should I just fuck her brains out?
You obviously still have feelings for her and are still under the delusion that this fuckbuddy thing going on is a vessel for your relationship to continue.
Move on before you get yourself hurt.
You are in the most toxic point of a relationship. If you want to have a chance in hell of getting her back/making her regret everything. In one message simply tell her what you saw, and do not respond for weeks. She will literally fall into a void of pain. The whole fuckbuddy thing is so retarded and I personally would never be a part of a relationship like that. Anyone who can be is actually quite sick in my mind.