I minimized the amount of time I socialized with people because I felt inherently different, that I didn't belong, that somehow my presence was offensive/offending to people
try traveling to places where you clearly do not fit in. i have made similar experiences, not as strong, but i always felt like an outsider in school and in my environment mainly because i didn't want to fit in.
living in a different country made this a lot easier to deal with. i changed from being an outsider to being a foreigner, which the locals were curious about and i felt more accepted because there is no expectation for a foreigner to fit in.