Life is about winning and losing. You win some, you lose some. No one wins 100% of the time. I think it's ok to feel upset if you lose, though, but it's also ok to talk to her if you lose. I'm sure she would love to continue talking to you regardless of who wins or loses. I think she would be hurt if you didn't talk to her again.

Try not to feel embarrassed or ashamed. It's a tiny, tiny bet.