I knew they were dating but she was cheating on him ( she has two boyfriends). We met up in another state and we hung out and made love couple times although he denied being in a relationship with her, I made myself believe it was a mistake the first time but then it happened again and I’m fully convinced that I’m a bad person. I feel really guilty about this, I can’t even face her and she talks alot about him. I’m scared that she may find out sooner or later and hate me for it. I don’t have feelings for him and this is my biggest regret. I was horny and stupid