Comparing myself to others

I have a big problem when it comes to comparing myself to other, I’m shy i have no real friends except online ones i sit in my room miserable and I feel like I’m wasting my teen years when i see others out with friends having fun drinking and partying, i feel bad when i draw something i thought was really good but then i look at somebody else’s piece of art compared to mine and I just feel stupid, i feel bad when i learn something on the guitar but then i see somebody else’s i know absolutely shredding it and I’ve been playing a year and i still can’t comprehend the basic shit, i hate seeing somebody else who’s more attractive and fitter and I just feel ugly in comparison. It’s exhausting comparing myself I just feel like a loser like i have nothing to offer I’m not exceptional  it makes me want to die why do i keep doing this to myself it makes me hate people