If you realize it's not what you want, then you should just tell them. They need to respect your boundaries. Me and you didn't make out at Poly Cocktails (at least i think that's where you were based on your posts), but maybe we will next time (just a hypothetical , not trying to be creepy) and i would never assume that just b'c we made out once, i had free reign the next time i saw you.
p.s. it's after 3 a.m. so if any of this came out weird i apologize.