My boyfriend is at a poker night with his friends and other girls?!?

My boyfriend is currently at a poker night in his best friends house and usually i would be ok with this but his friend has invited other girls who happen to be actresses...meaning they're really forward and confident. Me and my boyfriend and now in a big argument about it because I'm angry i never got invited by his friend or my boyfriend. Am i over reacting or do I have right on my side? What should i do? He is also staying the night at his friend's house......