I am guessing you are probably young, and probably from a religious background that has taught you to wait before sex, and probably made you feel that having sexual urges as a young girl is an unhealthy thing.
That is wrong. That is COMPLETELY wrong.
Women and men both have sexual urges - that is natural, beautiful, and healthy. One of the biggest reasons that we as a culture tend to demonize womens sexuality and promote mens is because we are still trapped and informed by a culture of the past. In the past, if a woman had sex with a man she had a very large chance of becoming pregnant. Therefore, culturally it made sense to try to control womens sexuality - it was a form of insuring that a large number of unwanted pregnancies and unstable family structures didn't develop.
But guess what? Today, that doesn't apply. Women can take a simple pill, and can have all the sex they want without getting pregnant. There is no longer a cultural REASON for trying to suppress young womens sexuality. What we have left is tradition - nothing more.
Is a left over tradition, with no rational basis for todays world, a good enough reason for you to repress your god-given, natural, and beautiful horniness? I would say no. Maybe 2,000 years ago - but not today.
A million feminist authors have written about this subject a lot better than I can here, but here is what I would suggest: Start masturbating. Start accepting that you are a sexual person, that you are made to BE a sexual person, and that there is NOTHING wrong with that.
Then I would suggest you take the time to read some more literature on the subject, start to think beyond what you have always been told. The world is a HUGE place, and the ideas that you were raised with are just one of a million - and when you become and adult you get to CHOOSE which beliefs you want. Now is the time to start looking around to see which beliefs you want to have that will make you a happy, well adjusted adult.
I did a quick google search on "women, sexuality, feminism" and things like that. It brings up a lot of good articles. Here is a book I think you should read:
http://books.google.com/books?id=GzUtLpwN0twC&printsec=frontcover&dq=helping+young+girls+accept+their+sexuality&source=bl&ots=ZrJC57cTlD&sig=n9X2xSxbjKNvNw6cixSAFmy8MOQ&hl=en&ei=HQUeTauxHY3SsAOXvMDlAQ&sa=X&oi=book_result&ct=result&resnum=3&ved=0CCsQ6AEwAg#v=onepage&q&f=false
Hope that helps. : )