Are we friends?

Rosie • hormonal af, from sunny la, I don`t know what else to say!
I mean, I don't think so. There's this "friend" I have that is always making snide comments about me- only I can hear these. I only ever see her in a group setting and she acts a little fake, as if we are still as close as we used to be. I miss her as a friend, but her actions just throw me off.
Once, she got up and slapped me at a party and then proceeded to blame me for it, saying I hit or shoved her first. She wasn't that drunk so I didn't know what to make of it.
She will say things like "ew" to me, dismisses me when Im talking to her and it's awkward since we can't have a conversations with just the two of us, but if another one of our friends is there she acts all bubble and fake.
The most baffling thing is that I've seen this girl throw up on herself but she has the audacity to say ew to my friend and I for taking a pic in this weird bar last night.