Fission gave you great advice, the only thing I can add, is what you can do to occupy your time is to exercize, it will release chemicals that will help with the want for sex so much.
Hate to tell you this but it'll get worse before it gets better. Not only is it natural, but it comes with age territory. If you want to stay a virgin until you are married, then this is the time where you will really have to show some serious, serious will power. It's entirely up to you whether or not you will submit to your desires. Increase your social activities, exercise, volunteer at an elderly home, write, read, sleep, try to only masturbate when you really can't take it anymore--basically, occupy your time.
Until you conciously make the decision to have sex, try the above. If you don't exactly make it to the marital bed a virgin, don't feel bad. Just make sure that if you do have sex, YOU are ready and it's what YOU want...and of course, use protection.