LTR of about a year. We are both 27. We see each other about twice a week. We decided to plan a ski trip for this weekend. We split the condo and the whole trip in half. We get to the resort Friday night. We start drinking and she got very drunk. We are having sex all over the condo. We are having a fun time. She puts her phone down next to mine in a chair in the dark. A couple minutes later I see a notification go off and I pick up the phone thinking it’s mine. Some guy from her school sent her 2 texts. It was around 9:30 PM. I was suspicious but I put the phone back down. At this point I was wondering wtf was going on. I withdraw my attention from her for a bit and I watch her behavior from the other side of the room. She picks up her phone. Sends a quick text back. Puts it back down. We go get more alcohol. She gets even more drunk. Lays out on the floor. I look at her phone and there was no notification on the lock screen. So I send her a funny pic of her laid out. And I see that she turned her notifications off from the lock screen. I was very drunk as well and later I tell her I saw a text by a guy on her phone. She tells me it’s a guy from school. I called her out on her being shady with me by turning her notifications off. I packed my stuff and left. She didn’t try to show me the text to prove to me it wasn’t anything bad. She was saying I over reacted. I was also very drunk and lost frame. I broke up with her and the next day (today) she picked up her stuff from my place and left.

LTR had been giving me attention even tho she has a busy schedule so I feel dumb for breaking frame and dumping her. Any words of advice would be appreciated.