I slept with a guy in march time but now I'm starting to feel for him. Bare in mind I didn't have any feelings for him back then. It was basically a one night stand because I found out after we slept together that he had a girlfriend. He wanted to carry on seeing me just in case they broke up. I said no and I didn't know who the girl was so I obviously couldn't tell her. We stopped talking after that but now I'm starting to think what we had was nice. We had the best conversations and he was areally nice kisser. Am I stupid for feeling this way?