Sometimes staying in when your friends are going out is absolutely necessary.
Now I'm not saying you should sit at home every weekend and never go anywhere with your friends, but you don't have to go to everything. In college, we feel pressured to go to every Happy Hour or birthday pre-games, but sometimes you just need to chill and recharge.
If your friends are going to a concert that you are not particularly fond of, don't force yourself to go if you know you won't enjoy it. Just tell them you're going to take one night off to watch Netflix, eat snacks, and lounge around your living room.
Let me say this again for the people in the back or the people who think you have to go out every night. It is perfectly okay and normal to not want to go to every single get-together that takes place.
I don't think you should let this become an every weekend habit because then your friends are going to stop inviting you places altogether. Maybe you could make it a once a month thing, or whenever you see fit. As long as you aren't skipping out on your squad every weekend, you're good. Any good friend will understand when you need a night to relax and recharge on your own. Honestly, maybe some of your friends would even ditch the plans of going out to join you in your night of relaxation!
As I said earlier, don't skip out every time, because college will end and you want these memories. However, don't give in to the pressure that you need to go all out every weekend, because then you'll just end up burnt out.
So maybe this weekend you could rent your favorite rom-com and recharge from the comfort of your own home, rather than being sweated on and pushed around at a crowded bar.