my roommate is gone half the week because he's on vacation and I'm realizing I have no idea how to live alone and how weird that will be

I mean he's been gone before but... he's moving out later, and I've never lived alone before. there's some kind of weird psychological loss of safety from it, even though he's been kind of an unsupportive drag on me literally the whole time I've known him so it's literally fully irrational. I am in much confusion of feelings