<human>: Summarize the given text in a few sentences.

okay. I yet am in a relationship with my girlfriend. She recently told me she lost her love and feeling for me but she said me she still wants 2 weeks to think about it...
She ensured there was no other guy but I was suspicious. . . Don't know why, just had this feeling. . .

I was sure she was breaking up with me and sadness and despair was inevitable. . . 

Today I opened Firefox (I'm using chrome usually) and noticed she was still logged in in Facebook. and YES I was nosy and started looking up her chat conversations with some  close friends just to find out she cheated on me (also found the guy she's having an affair with)
I'm so mad I can't even think straight and don't know what to.

My Love for her and my sadness just got blown away in an instant and now there is only anger and hatred left. . 

r/relationships, what should I do? Should I confront her?

Additional information: we've been a long distance relationship since one year and we're going to meet up in person the next week.
<bot>: girlfriend told me she does not love me anymore. I found out in desperation that she cheated on me. Meeting up in person next week. What now?