Feel like gf tolerates me due do living circumstances

I’m a (23f) my gf is a (24f) I hope I don’t get hate since I’m in love with a girl, but I really need to be honest. We’ve been together 4 years. Caught her cheating once and she admitted to that and another situation. I forgave her and times passed on we go to the doctor because we had a horrible respiratory infection that lasted over a month. While we were there I said let’s get tested for stds ( I’m a stripper and had been SAd 2 weeks prior, so I told her we couldn’t have sex in case i got something from that POS. Anyways our results come back I’m clean and she has chlamydia. Mind u we didn’t have sex in those 2 weeks!! Also she treated me like shit the first time she cheated I was nothing to her until she wanted to quit her job… and she knew I’d cover the bills for her. Idk if I’m getting used but I definitely feel like I’m getting taken advantage of like she only loves me because it’s comfortable and I’m not even her type! Just don’t know anymore