How do I stop comparing myself to my friends/acquaintances who got into better medical schools or getting higher MCAT scores than I did and may be getting into a much better program when they apply?

I want to be happy but I keep feeling like I’m a loser. I got into a T100 MD but I still feel I am not enough and I feel bad about myself. It is so bad and I want this to stop but I don’t know what to do.

This hits especially hard right now for me in real life, when you just hear and talk to people and then compare yourself. And even on sites like these.