<human>: Summarize the given text in a few sentences.

My ex wanted a break in April and we were going to work on things over the summer. I suffer from anxiety and he said he'd had enough. In June he ended things, blocked me on everything and my phone number. Then literally two days after he officially ended it he was in Rome with a girl from his class for two weeks, so I feel like he obviously was talking to her before he ended things with me. 

I was always jealous of her before this happened, and my ex always said I was crazy for thinking anything, but clearly I wasn't. I can't explain it, but I just had an intuition that he had feelings for her since we started school last fall (we all go to the same school). The thought of her would make me so anxious and I felt like the more distant we became the closer they got. But I believed him and genuinely thought it was all in my head and I was crazy. 

Now they're dating and whole situation has me so messed up I can't sleep or eat. I'm depressed and anxious. Being at the same school as them makes me a nervous wreck, and to make it worse he lives on campus - literally right beside the building where I attend all my classes. I feel like I'm living in my own nightmare and like it's all my fault. I feel so abandoned and like I lost my best friend. 

I can't trust anybody after all the lies he told me and I like I can't connect to anybody, even on a friendship level. Even with my profs and family, I feel no connection anymore. It's like I've just shut off myself from others and I've stopped caring about myself and others. How do I start to reconnect with myself, learn to trust again and how do I start to get over this?
<bot>: my ex left me for a girl in his masters and I knew it was going to happen and now I'm extremely sad and DGAF about anything