I suppose it's a very important theme among teenagers, especially in USA) but, fortunately, I didn't have such a problem)

Probably I don't have the necessary experience to understand such thoughts.. When I was a teenager, I never asked myself: Do I fit in? Even now I can't understand what it means. Does "to fit in" mean "to be accepted, to be loved, to be admired, to be understood"? Or does it mean "to have no problems with your peers"? Someone please explain it to me)

I think the question "Do I fit in?" means "Am I accepted by the society?"