I've Been Wanting to Have Sex With Him? :(?

How can I get rid of sexual desires and cravings for this one really really REALLY cute boy at my school? I don't have the courage to call him, and his twin sister hates my guts. I want to lose my virginity to him, but we're both going into eighth grade next year and I don't want to lose my virginity to a guy who will just dump me because he did it with me? Once we were talking and he suffered an erection, and lots of times we would talk to each other in the hallways at school. If I do it with him, I want to make it something memorable, but HOW do I get rid of these feelings? I think he wants to do it with me as well, but I haven't even had my first kiss yet! -__- is this normal behavior for a 13 year old? And how do I stop it!