....you can very easily change how you dress. I wore ill fitting pants for years. Now my pants fit. I'm not high fashion or anything; I wear jeans and T shirts

....you can very easily change how you dress. I wore ill fitting pants for years. Now my pants fit. I'm not high fashion or anything; I wear jeans and T shirts. But they fit. This is pretty simple to fix. It's not a huge deal for making friends, but it isn't zero. This may not be OP's problem, and it may not have been your problem, but a lot of introverted men are awful dressers and it adds friction to hanging around with them.