You won't go to hell for it, but sex before marriage is a sin! God has special plans for all of us, and if you spoil that He won't be pleased. It's only human to have desires, but be strong and overcome those desires. Realize that you are better than that, and God wants better for you. There's someone out there in this world for you, and when you find him, and get married it will be all the more special if you wait like God wants. God forgives us for all are sins when we ask, but it doesn't mean that we can disobey him if we like because we know we'll be forgiven. God knows all are thoughts, so we cannot plot against Him or hide anything from Him.
Hon, don't give into the temptations! You will be glad you didn't in the end, and so will God.

