[Coming out] I came out and now I regret it. A lot.

I was kind of tipsy last night because of a party. I still haven't really accepted even to myself that I could be anything other than straight, but I told my best friend I thought I might be bi. She was really understanding and accepting, and I live in San Francisco, so it's not like I am worried about homophobia. But I'm just scared and regret it all so much now. Like this was my darkest secret and it's one that I needed to not ever happen and now it's too late?! How should I act straight so she forgets about it?! Or how do I stop feeling like this??