Please, tell me how you think a married man would react to the situation. If this man genuinely loves you and cares for you, his reaction should be the same as if you weren't a virgin. You need to treasure your virginity.
Sex is more than a physical act.
The emotions that go along with such deep intimacy is overwhelming. You need a man who can love you and be there for you. While this guy will probably embrace your virginity, embrace someone who can love you. Please, don't waste something so special on a married man. It's hardly worth it.