<human>: Can you condense the text into a few key points?

Whenever my girlfriend gets drunk, she either runs off and does her own thing or tells me she loves me over and over and she doesn't want anybody else (yes, its very sweet and i appreciate it) then proceeds to stick her tongue in my mouth. And I don't mean this as a funny description, she literally just sticks it in my mouth and keeps it there as I go in for a normal kiss and just kinda kiss her tongue. 
 
Oh and this all takes place by a bar near our friends (who were in the middle of saying something to us) who have to turn away out of awkward necessity. I usually brush it off, tell her I love her too, and kiss back. But she gets really sloppy when shes drunk and usually her memory gets fuzzy. 

     
She might think shes just being sweet and passionately kissing me but really it's the worst kisses shes ever tried to give me. She thinks I dont like PDA (which Im not a fan of, nothing wrong with that, right?) But I definitely will kiss her in public. So we got into an argument about it and she says she feels stupid because I was embarrassed. Im trying to find a way to delicately explain how I honestly feel to her.
<bot>: GF gets really drunk and tries grotesquely making out with me in the wrong place at wrong time. How do I give her my perspective without making it worse?