Sleepy after socializing/being in a social environment?

Maybe a weird question but does anybody feel physically exhausted after socializing in any way or being in a social environment regardless if you've talked to someone or not? I remember when I'd come home from high school and immediately taking a nap, even when I never talked to anybody there, I'd just feel so tired. When I hang out with family I get so sleepy 3 hours in. On the rarity that I go out somewhere, I come back home and just want to lay still for hours. Just being in any social environment makes me so physically tired. I'm not sure if it's because I'm subconsciously on edge the whole time that I tire myself out.