Enjoy the night in for a change! Hang in there, once your roommate is gone things should settle down. I was a big nightlife/bar person myself. I've spent many many a Saturday night dancing at the club. I used to try to go out in early sobriety but it always ended up with a relapse. I would make it through the night out OK but then Sunday morning the stress of it all would collapse and I'd be pouring a drink.
It was hard for me to fathom a life without nightlife. I used to be a club dj playing at dance venues and did so for more than a decade. These days I can go out again but I don't have to. I've found there's plenty to enjoy and I can dance in my living room if I want to.