Girlfriend slept with another guy while we were on a 'break"
I'll make this as short as I can. I have been with my girlfriend for 5 years. I am two years older than her and went all through college dating her (she goes to a different college). This year, she is a Junior. Halfway through her semester this year, she got in a ton of trouble at her school and was accused of using drugs.
She became depressed and hated her life. She asked for a break from me, which I didn't understand. She didn't want to talk or text or anything. She wanted to get her life back on track. This was tough, as I would frequently call her and text and we would argue and fight.
Thanksgiving break comes and so does Christmas and we start getting back into the groove of things. She just went back for school on Sunday.
Last night, I found out from one of her friends that she had a one night stand with one of her guy friends at school while we were on our break. We discussed that this break had nothing to do with it, and from what I can tell,she truthfully meant that as her friend said she wasn't dating anyone or seeing anyone and I was still frequently talking with my girlfriend.
The thing is, I did not think it was a true break. She did at one point say she needed space and time to be alone and that it will be the best for us in the long run cause she loves me and always wants to be with me. She said that when she first asked for the break.
To wrap it up, I hung out with her all thanksgiving/christmas break, and she slept with this guy in October. She never told me. I found out through Facebook. What do I do?