If you are serious about your boyfriend and want to get married (I'm not sure of your age), then get married. If your not serious about him, then break off the relationship. Sexual expression is very serious and has a purpose. "Being" with someone and not being married is akin to giving out a piece of your flesh and never getting it back. After a while, you've got nothing left to give the person you really want to give yourself to if you've given it away to others.
Think about what you really want....to be thought of as a person of value or as the local "trash."
The decisions you make now will put you where you do or don't want to be 10 years from now.