Is my relationship doomed?

Anonymous

So I’ve (23) been dating my girlfriend (22) for 4 years now, recently moved in with here nearly 1k Miles from my city for her to go to law school. I hated the idea of moving up until I left and at first I had told her if she accepted we would have to break up because I don’t trust her enough to do long distance.

Our relationship when it stated seemed awesome and I fell for her out of pity because she said no one wanted to ever stay with her and she seemed sweet ( Red Flag! ) but I found out a week before moving with her that she was cheating on me a lot the first 6 months of dating ( found evidence ). All that said I’ve caught her in the past having an affair with the guy that popped her cherry within those first 6 months and ironically he had a girlfriend at the time that happened.

I do think she’s cheated on me since, over the past year she’s been living with her sister by a dog park and her sister would always joke about how friendly my girlfriend was to other guys at the dog park and that she would sneak liquor in the dog park to talk to “Dog dads”, there was one time she was supposed to pick me up from work, I was working security for a football game from a gig I got from my football team and the parking at the stadium is always crazy so it saves money to car pool and just get picked up and she said she would pick me up and she was hours late and her excuse was sorry I fell asleep, I called her like 40 times because it was cold out and just walked home, I don’t really believe that. A little over a year ago I found small men’s underwear in her room ( I got a double x ass) so I knew it wasn’t mine and I brought it up and she said it was her little brothers because sometimes he pees the bed, he’s a 280ib 16 year old though ( I was close to his weight at the same age, maybe a bit more and I couldn’t fit into a large ).

I loved her more than any prior girl but I’m starting to hate her thinking who she truly is. Should I work on this, talk to her or just end it?

Updates
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Also should state, I came a week and a half late so I could finish my work with my prior employer and I asked her not to go to a party because we were in a bad state and she did, I was also cleaning our bedroom and found my gfs old sex toy bag with condoms hidden under the bed I had to throw out and all the ones that weren’t expired are missing ( I know because I bought a bunch before we decided to go raw since she got her IUD ). That said she could of gave them to her sister or friends🤷🏻‍♂️
Is my relationship doomed?
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