I'm 19 years old, going into second year of uni. The housemates I'll be staying with next year are amazing people, but they go out pretty much every Friday. As an introvert, I'm really not built for that. I'll go out clubbing and drinking but I can't do it every Friday and need a couple Fridays to myself watching a movie or something. Is it bad if I occasionally stay at home on a Friday night when all of my housemates go out?