I met this guy, who I thought was wonderful. He seemed interested in me, but he’s been using me for sex. It seems to be the only thing he wants. But a few days ago, he told me he’s married. I feel horrible for helping him cheat. I don’t know what to do.

I should mention that the first time we had sex, it was unprotected and pregnancy could be possible. He doesn’t want children.

What should I do?