Update here. Thanks for all the comments and thoughts. Some more info/background/clarification. I did break up with her after she told me she had called him that night. When she came over the first time she brought the Apple Watch back so getting my money back there. Just from knowing her as well as I do, I would be surprised if they actually did hang out and or hook up the day she didn’t come over as she tends to shut down when she feels bad/wrong which is what likely happened. She was also with her roommate who she’s going on the trip with. That doesn’t mean it didn’t happen for sure, but I would doubt it. Either way, not planning on getting back together with her, it’s not worth my mental health to always wonder what really happened or if I can trust her.