<human>: Male and female, both 20 dating for around 3 months. The relationship is going well but I don't know how to communicate this issue without coming off as uncaring or unaffectionate or a bitch.  I feel uncomfortable when my boyfriend, after a couple of drinks, is really really affectionate with me while we are hanging out with groups of friends, like holding hands and cuddling is fine but he just wants to make out with me, and I find it embarrassing...no one wants to see that. 

I tell him that, and sometimes he backs off but mostly not, I end just turning my cheek and feeling like..cruel for rejecting him? And that's not a nice feeling. He is really sweet but it kind of feels possessive. He hasn't had a relationship before and I understand maybe he is inexperienced...but I still want him to respect me. I'm not a prude. We makeout and have sex often, in private, or at least not around friends/social gatherings. I like that he is affectionate, but how do I communicate that I've had enough, so that he will listen, but feel rejected/like I'm angry?

He's the perfect bf apart from this, really, so I don't want to make it a big deal, I just think PDA is gross!

Can you succinctly summarize the text in 1-3 sentences?
<bot>: boyfriend overdoes the PDA while tipsy and I want him to quit it, but don't want to say it in a bitchy way.