Most people feel comfortable to do ANYTHING around their friends and family (the people who's opinions matters the most) but are afraid to do stuff in front of people they don't know (the people they'll probably never talk to). amirite?

I am that kind of person

Often wondered why I care about what some fat, ugly guy said to me in the 8th grade compared to the massive groups of people that love and support me.

Friends and family will judge you based on the whole of your character shown to them. Say one stupid thing to a stranger and that's all they know about you.

Nah all strangers are like npc to me unless I wanna know them.

Probably because we know that those who love us won't judge or mock us for being ourselves. Strangers though are a bunch of judgy Judys