I gave something away...and now I want it back.

I was a virgin until last Sunday. I unknowingly gave it away to someone who was not only non-deserving, but a total prick. I am left with not only the physical pain and worry associated with having sex, I am also dealing with the emotional ramifications of giving away something that I did not want to. I am so heartsick, that I don't want any man to even look at me. I have been single for about 5 years. I miss being held, wanted and kissed. Everytime I said no, this guy would keep trying. I feel like someone who got used and thrown away. Like paper towel. I feel so stupid. I should know better. I should have known better.