He's being nice to you because he wants something (and it's probably not your love). More than likely, he likes the thrill of the chase, you being a virgin makes it even more worthwhile.
Listen to what people are saying - reputations don't come out of nowhere. If losing your virginity to someone who is genuine is a priority for you...then think long and hard. Your first time can't be repeated and it depends on you as to how valuable you want the experience to be. It would be sad if he used for sex then dumped you.