I'm absolutely torn?

my girlfriend left me a month ago because her parents threatened to cut her off of all her financial help if she didn't. they thought I was a loser because I lost my job due to discrimination about my epilepsy, which I have a lawsuit in progress, and I reacquired one within 2 weeks. so she moved out and literally moved in above me in a 4plex. well even though she said she wasn't ready for a relationship within three weeks she started seeing another man and I can hear them having sex up in their place. I can't take this and I'm on a lease so I can't move. I loved this woman and never did anything to her and she does this? please help
I'm absolutely torn?
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