Clearly ended up on this post as I’m going through the same thing. I hooked up with my BEST friend, it felt like an absolute soul connection - laughing at everything I said, getting the joke instantly, always being flirty and close (hand holding, making comments about tattooing each others names) it was so easy to fall in love. One drunken night later we hooked up, I was out of my mind drunk so the sex was probably not good, and I don’t remember much of it, but the parts I do - I regret. It reminds me badly of how we crosssed a line and how badly my feelings for her ruined things. We slowly faded away after the hookup because I actually wanted more from it, where she thought nothing of it but also didn’t seem to want much of the friendship going forward either. We haven’t spoken in nearly a year now and I thought I was over it but here I am missing her terribly. I wish there was an ending to this story that I could be happy with or look forward to, but sometimes the peace lies in the fact that this happens frequently and a part of life.