firstly...your not into girls, fine...obvisouly this girl is...and mabe she wasnt aware that you wernt...a little liquid courage and she kissed you...
is it HONESTLY that much of a big deal, you told her "im not into girls" and she apologized and then as any normal embarrased person would...blamed it on the mikes...
personally i woudlnt give it 2 thoughts...
i do feel she was out of line trying to full on make out with you, that was overbearing rude and gives all us "girl kissers" a bad name, however the simple act of the kiss doesnt nessicarily mean shes going to try and rape you next time she sees you. i dont think you need to be nearly as on defense (not being around her) as you seem to think you need to be...if your uncomfortable around her, just dont be alone with her.
id relax about it..next time you see her just say "hope no bad feelings right? im just not into girls" to make sure you hammer the fact home and make sure she gets it.
but i very much doubt your at risk of it happening again...some people are exceptionally bad at reading someones body language and she prolly just picked up the wrong signals...
and while it might take lots of alc to get hammerd, it doesnt take much mikes to screw up the signals and give you the courage to make a move...
a bold move, bolder than i could ever be...but a move none the less...
relax and TAKE IT AS A COMPLIMENT lol...girls are shallow...especially about other girls...so you must be hott!