Thanks everyone! I really appreciate all the advice so far. It's just frustrating, and knowing that it's my own fault, and that I broke the terms frustrates me to no end. It seemed harmless at the time, but I guess I was wrong.

The only part I get nervous about is being honest about it. Someone quoted the part where they could come after me for the full value of a ticket, plus attorney fees. I think the ticket I sold is probably expensive - it was First Class international - aren't those like $10,000 normally? So if I come clean, couldn't AA slap me with a bill? That's the part that makes me the most hesitant.

I really want to save my account, and I'll never ever ever do this again, I won't even gift miles, as it could look funny. But I'm scared to admit to anything because I don't want a 10,000 bill!