Looking back do you realize a lot of people were really into you and u didn't quite notice/believe at the time?

sometimes in school or other place like that i think someone may have liked me but i blew it because i was too nervous and shy. i don't really feel bad about it since i think it's the athmosphere i've always hated school more than anything i have a really anxious personality i'm always fidgeting my leg and my palms are swetting and my heartrate is high i just really hate that environment anyway so getting a girl's number there would be even more nerveracking.