One angry momma

I just need to vent to be honest. My SO likes to have his friends over to drink almost every weekend. Im 32 Weeks...and i have a horrible cold. He is a grown ass man and does not even take into consideration of how i feel. This is a constant argument that we have and nothing every even changes. I love him but why cant he see we dont need people over every weekend. He thinks im too possessive. I mean i could be over reacting but it just really gets me going. :(