Honestly, i would never move in with multiple people + a boyfriend.
I have seen things work with two established couples (not simply dating 6 months but two siblings and their spouses, etc.), but it never works with boyfriend+girlfriend+two other guys unless its main house, then someone lives in an in-law apartment or above the garage. Recipe for disaster.
I would move out and move out with 1-2 other young women instead. Its not fair to have no say in the selection of roommates and have to live where someone is smoking pot etc.

Move out with a couple young women or to a studio apartment