I'm going to ghost a close friend after uncomfortable sex
Why would you ghost her because of this?
We slept together, without protection because I was drunk. She wasn't in the mood when you do that to someone especially if they are not in the mood for it too.
Being drunk is no excuse for sleeping with someone when both parties aren't into it and then to leave them hanging afterwards makes the situation worse. Sit down with your friend and set your relationship straight with some honest talk.
That'll be a mess. I do that because she always sexually teases me and I'm going to cut all the sexual tension.
Being honest with her is less messy than just ghosting her. She is not going to stop bothering you because you don't respond, just talk to her and work it out.