I had my first sexual experience with my girlfriend a few months ago. She told me she was a virgin, but after having intercourse, I didn't believe her and was hurt. She didn't seem to be in any pain, there was no bleeding, and there was no hymen. She makes up all these excuses like "not all girls have them." Should I believe her? Is there a sure-fire way of determining whether or not I was her first? It is making me angry. Can you ease my pain?

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?