You are pretty much busted. You are gonna have to sweet talk your way out of this one. Rebgirl was right on with this one. Just tell her you were thinking about her. And NO ONE else. Just tell her SHE was the ONE you were thinking about. And promise her that. Tell her that she was the one you were thinking about, you just didnt want to wake her up. Tell her those girls mean NOTHING to you and you just wanted to be with her.

P.S. I HATE it when my girl gives me the "You fell asleep on me." Routine. Wake me up with a BJ or something.