<human>: I think my best friend [24F] likes me and I am considering asking her out. We've become really close over this year and I think she'll say yes.

Recently I hooked up with a rando at a bar. This isn't really something I do very often and my best friend knows that I don't do that. But I was curious and figured I'd give a try. It was fun but now I kind of regret it.

My best friend and I tell each other everything but I feel like this would only make her sad. I haven't hooked up with anyone in a while and neither has she (although we've talked about people we dated this past year).

I know in theory I shouldn't feel any guilt and probably shouldn't tell her, but I need some advice getting past the regret and feeling comfortable starting a real relationship.

Can you provide a brief rundown of the text in within 3 sentences?
<bot>: Hooked up with someone. Don't like her. Do like best friend. Feeling weird. How can I get rid of my guilt?