<human>: Since i can't talk about it to anyone in RL so i am asking here. I will start with some background. 

We are together for 4 something years and we had a good time and we spent most of that time together with not many alone time (which neither of us minded). But lately things got little cold, and i found out that she has been thinking of taking a little break just to get some space. So i agreed to the break but told her if she sleeps with someone it's over. I know we are technically on break, but that is just deal breaker for me. For a week we didn't have much contact, but through a mutual friend i found out that she is thinking of sleeping with this other guy, and they are making some plans already. Normally i'm rational person, but something inside of me went crazy and i logged onto her FB where i basically confirmed what my friend told me. After some cool off time i decided to ask her about her plans and if she is planning to sleep with someone. I asked because if she really wants to do this, i must start getting over her. When we talked i didn't tell her about the facebook stalking for obvious reasons, but just flat out asked if she is planning or wants to do someone else. Now here is the problem she denied it all, and i wussed out and didn't tell her that i know she is lying. Than we talked about some generic stuff and agreed to talk in a week to decide wether we want to continue together or not. And now all i can do is think about her sleeping with this other guy and it kills me. Normally i am rational, logic person but now i am kinda going crazy. All help or suggestions are wellcomed, and thanks to whomever reads this.

Can you condense the text into three sentences or less?
<bot>: GF asked for a break. I told her that if she sleeps with someone we are done. Found out she is making plans. Asked her about it.She is denying it. I am going crazy