How to be confident?

Ditch the comparisons  

 You are you. That's all that can be expected of you.There's really no point in comparing the unique person that is yourself to someone else. Just remember:

You have not walked the same path as the person youare comparing yourself to.

You have not had the same opportunities as theperson you are comparing yourself to.

You do not possess the same set of tools as the person you are comparing yourself to.

There will be places that you excel, where otherswill fall short. There will be places that you fall short, where others will excel. This is life.

Let it go, and simply be the best you that you can be.What everyone else is doing really isn't a standard to hold yourself to.