You're intrigued by sex, you're no stranger to desire and you're deeply drawn to idea of getting it on with this guy, but then every time you get a chance to sleep with him, you slam on the breaks. So what's this telling you?
It seems fairly clear to me that you're just not ready. I urge you to listen to your body, respect your instincts, give yourself time. If this guy is the one you're destined to lose your virginity to, then a moment will come when the moon and all the planets are aligned and every cell in your body is screaming out for you to go all the way - THAT will be the day you're ready to have sex with him. I can guarantee you won't regret the wait.
When everything feels this right, it's a sure sign that you trust the man you're with, you're comfortable being naked with him, you've sorted out your contraception, you've learnt to read his body and he to read yours, you're free of inhibitions, and you can't think of a single reason in the world why the two of you shouldn't make love.
If, on the other hand, you get the timing wrong simply because you succumb to your desire to please this man, there's a good chance you'll end up resenting him later, and this would seriously sour the relationship.
I urge you to explain to your boyfriend exactly how you feel: tell him you're mad about him but you need more time. If he's a nice guy, he'll get it at once and ease off on the pressure. But if he's not so nice and threatens to throw in the towel, then you'll know that your reluctance to sleep with him had a rock-solid foundation - the guy will have proven himself to be interested more in your body and the fulfilment of his own pleasure than in your psychological welfare and your serenity as a couple.
If he does indeed turn out to be this kind of guy, then you really are best off without him. Men from this mould tend not to stick around in a relationship too long in any case - once the novelty of sleeping with one woman has worn off, they tend to start casting around for another dame to conquer.