A guy was pursuing me while I had a boyfriend. We are very much physically attracted to one another but I would not leave my boyfriend for him. I did, however, develop feelings for him and left my boyfriend. I ghosted this guy because I didn’t want to be involved with two guys. Now I want to get this guy back again but he is in a non-exclusive relationship. He says he will only be friends with me but how can I change that? How can I win him back? I know I hurt him when I cut off communication with him but how do I let him see that I’m serious?