<human>: my boyfriend of almost 4 months went to where both of our parents live for the holidays. I stayed back because I work tomorrow and didnt want to drive today. 

I recently signed up for facebook again and requested to be his friend. I know he gets notifications to his phone and is on faceook all of the time, but he did not accept it for a week until i asked him in person why he had not accepted. anyways, last night i noticed there are pictures of his drunken thursday night wine night with some friends from back home. there was only one other guy there and all of the girls seemed to be hanging off my boyfriend! one girl is licking his face in one photo, there are aout 4-5 where they are sitting on his lap. Im not a touchy person, but am I allowed to be upset at this? 

I want to bring it up and say that I'm jealous or whatever but dont want to ruin christmas. We're not in a very serious relationship and I've never had one so I dont know if this is even an issue I am allowed to feel sad about.

Summarize the given text in a few sentences.
<bot>: girls hanging off boyfriend at wine night and i'm upset. Am I allowed to be upset and how can i bring it up if so?