I have been dating a guy for well over a year-and-a-half, and we really enjoy each other's companionship. We have a great friendship and a great sex life. The problem is that I am finding myself attracted to another person. I think this other person has a girlfriend. Furthermore, I don't want to have a relationship with this other person — it's just that I find myself dreaming about kissing him because he is so attractive. I know I'm crazy because everything is great in my relationship and people envy the relationship I have with my boyfriend. I just can't get this guy off my mind. What should I do?