Doubt means you're human - congratulations! It's natural to have these feelings, and if anything makes you humble, just don't be ruled by those emotions.
So much magic lies beyond our fears.
There is plenty of room for us all to succeed and carve our own path.
There's room enough for everyone to thrive.
Just because someone disagrees with you doesn't mean you're wrong.
Anytime I feel my feathers ruffle off of someone else's success, I have to check myself. It's normally fear based or ego related and it's my daily work to let it go and focus on me, because that's the only person I can control and make grow.