So last week during Halloween I was out on the town at some bars, while out I ran into a girl I have a class with. She was pretty drunk and wanted me to buy her a drink to which I declined, she solicited to kiss me for a drink, which I again declined. She misunderstood me leaning down to reason with her (bad idea) and she ended up kissing me a bit. I didn't take it serious because I figured she probably wouldn't remember. Long story short I saw her in class today and just smiled because I find it funny, she made eye contact and smiled saying across the room "hey (insert name)". To which I just smiled and said "hey". Because what else would I say? Did i respond appropriately? The room was full so what else am I to do?

A note: I don't plan to game or plate her because she was raped three years ago at another university, I want to keep some distance.