Anyone here who tells you it's not possible is talking out of their butts, because there are people who die virgins, and there's nothing wrong with it at all. Sex is natural, and there is nothing wrong with it. But yeah, rather wait until you're married. Don't take advise from people who only think with their genitals and can't control themselves. Nobody ever died from holding it in until marriage, but a heck of a lot of people have died from doing it before marriage (AIDS, STD's). Which is why God told us to wait for marriage.
Don't put yourself in situations that will lead you to do it. If you can kiss someone and know that it wont lead you to have sex, then go for it.
And personally, I wanne marry a girl who is still a virgin - not a girl who's opened her legs to every 3rd guy she's met.