<human>: My longest friend Holly and I are close, but we live in different cities. On the weekend I flew down to surprise her after she passed her degree. 
  
It was a great surprise, and we went out and had some drinks and a big night. At the end of the night her friend Rach [27 F] asked me if I'd ever slept with my friend. I told Rach that we'd come close several times over the last 10 years or so, but it's never happened.
  
I crash with Holly - and then kiss her. Leads to fantastic sex. 
  
The following morning we snuggle and then have more sex. My head is swimming and I haven't stopped thinking about it for more than 5 minutes or so in the last 72 hours. Definitely no regrets, just completely unexpected! 

As we were both very hungover we had a hangover day, then I flew home. We haven't discussed it yet. I'm really unsure how to approach this - I know that years ago she was interested in me, but we were in different headspaces.
  
I know that we're always going to be friends regardless. I'm not really worried about that. I just don't know how to talk to her about it. 

NB: My last relationship lasted 2 years or so, where I broke off the engagement as it was an abusive and loveless relationship. That was 8 months ago.

Condense the text into a few key points
<bot>: Surprise best female friend with a visit (we live in different cities). Get drunk, have fantastic sex. No regrets, unsure how to talk about it with her now.***