Honestly, if they've "hooked up",
drunk or no that was testing the waters for herself. She probably felt immense guilt about it later, because she's still attached, but wasn't sure if she could handle it.
They might have been "farewell" hook ups, too.
If she's already looking at other men, I'm sad to say there isn't much you can do.
Maybe a few Love Gestures,
but that hurt and distrust will always be there.
Some women have moral guns that they stick too really hard, no matter how unreasonable it seems.
This may just be to serve you a life lesson, but holy cow don't ever pit yourself in a scenario where you could potentially hurt someone you care about. Are the risks really worth it?
If she's being unclear, tell her straight forward, you need to know if you still have a chance with her.
If she doesn't give you a response or flip-flops, walk away. Cut off all contact.
If she comes to you, give it a go. If you hear nothing, move on and distract yourself.
Give me something I can take,
Can take to make the memories fade.
Poison kiss, remember this,
I never was meant for this day.