<human>: Can you succinctly summarize the text in 1-3 sentences?

So at the beginning of the summer I suggested "taking a break" with my girlfriend. She's from Norway and I'm on the east coast but she goes to college at the same college I go to. It was honestly one of the hardest things I've ever done and now I feel like I absolutely made the wrong decision. She's been seeing this guy a little which I don't mind really she says he's sweet but tonight she spent the night over there and it's absolutely tearing me apart. I can't think of anything but that. I've been seeing this other girl but I definitely don't have strong feelings all I was after was a companion and someone to vent to until I could figure my stuff out. I called her while she was there and spoke for 5 minutes telling her how I felt through my crying. He was in the shower. She promised me they didn't and won't have sex but the thought of her sleeping next to another guy really hurts. I'm normally not this emotional and I don't know if I should get back together with her when she gets back? I'm beyond lost I definitely still have feelings for her but I'm not sure getting back together is the right thing to do. I'm so stressed out.
<bot>: on break" gf is sleeping over at another guys house. I thought it wouldn't matter to me but it's tearing me apart. I cannot make sense of this