What the hell would you do?

Dai and Danni are feuding, over me.
I really don’t know what to do. A couple of weeks ago Danni started flirting with me a lot more than she ever used to, and hitting on me. Its been making one hell of an awkward situation. I talked to Dai about it a couple of days ago, and he said that he’d noticed the change in her too, but didn’t want to say anything to her, cos shes a good friend… “how do you tell a friend to stop hitting on your boyfriend?”
So we thought, maybe, if we just ignored her she’d give up and stop. I wish.
Saturday night, we went out, everything seemed normal. But the more Danni drank, the more annoying she got. She started out just hugging me, not all that unusual, then she rubbing up against me, and trying to kiss me. Dai was watching her the whole time, and I could tell it was getting to him, if I didn’t do something he would. I got sick of dodging her kisses, and pushed her away, she pouted at me and tried again. I shoved her harder and said something like “Stop it, you’re making yourself look like an idiot”
She tried again, this time pushing me back into other people. I shoved her away again, “Danni, stop it. I DON’T WANT YOU.”
I didn’t give her another chance, I went straight to where Dai was. He grabbed me and kissed me, I was shaking, mostly from anger at Danni, but in part at myself for having to hurt her.
She was in tears, sitting on the floor. I hate myself for doing that to her. One of her other friends took her away. I haven’t seen her since.