Would this bother you?

My bf and I are both in second year of college... I live at home meanwhile he lives on residence. Across the hall are 4 girls in one "suite". Now I know my boyfriend thinks they're "incredibly" hot bc that's what he told his friends in his group chat (I wasn't snooping I accidentally read it while he was scrolling through the chat to show me a meme)... now my bf just sent me a snapchat saying how he's going to go to the 4 girls' room to get drunk with them.

Should I be worried? Scared? Am I wrong for letting this bother me (him going to their room to drink?)

How would you guys feel about this?