Believe it or not, other people are not as confident, talented, or in general "with it" as they seem. We see other people in snapshots and usually they seem to have it together. We see them when they are having fun and enjoying themselves, not when they are alone and depressed.

The best example I can think of is myself. At work I'm confident and professional, but when I get home my husband sees the pile of mush I become. (And I don't really like it that he sees it either so I try to cry when he's not around.)

You are comparing yourself to what other people present themselves as, not the whole person. We want others to like us so we put on a facade for a while at least. I've often said you can tell how well a person knows me by how polite they think I am. To most people I'm a caring, thoughtful person. To my closest friends I'm an irreverent smart-mouth.

You aren't the only person who has a hard time in social situations, but you are the one person you see in every ackward situation you witness. That might not make sense, but what I'm trying to say is that you see (and probably repromand yourself) for every "bad thing" you see in yourself because you are living with yourself. You are the only person you see 24 hours a day. Everyone has their insecurities about things but not everyone shows them when you are looking.

I'm not saying you should look closer at everyone else, but stop trying to get up on the pedistal of perfection for yourself. It's very lonely up there because no one else gets there either.

Saying all that, I should take some of my own advice because I have a feeling I've been in similar cirumstances.

Be the best "you" you can be, you're the best qualified for that job.