One night I went out and brought this girl home. We had s** and then I thought it would be over because I didn't really want a relationship. Like a week later my roommate and her started talking and within a couple weeks they begin dating. I was like whatever until she started giving me weird looks and texting me. I ignored her at first but one night I was really drunk had s** with her again. She promised she wouldn't tell my roommate. Now I have s** with her a couple times a week. Its great because she is dating him and always hangs out with him. We just have s**. I feel bad though. Do you think I should stop?