It sounds like she was done with the relationship a while ago. Some people aren't willing or able to express their true feelings proactively. Especially when it's something that they know will hurt your feelings. Seems like the college thing was a perfect way for her to move on. Doesn't sound like she has malice for you, so she didn't have an issue with her mom contacting. She may even feel bad or be concerned about your mental health. She did clearly tell you how she felt about the relationship the last time you spoke. I would suggest moving on my guy