I did something really stupid tonight. Anyone have any suggestions on how to make an unpleasant situation go away?

UPDATE: So I won't have to tell the story a dozen different times, I'll fess up. For three straight days over the Thanksgiving break, one of the girls who lives upstairs — the cute one — and I were pretty obviously flirting. My "something stupid" was making a pass at her even though I knew she had a boyfriend. I got shot down like I deserved. But it's not like I was totally at fault here, right? I mean, beer shoulders some of the blame, too, right?