Flip the switch

I wish my self confidence had a switch. I am just as self destructive mentally to myself as any outside force has been. I guess when you hear so much negativity for your whole life you finally believe whether you want to or not. I can say I know that I am smart and I know I have a descent personality and I am nice and honest; but there are a lot of opportunities that I pass on cause I tell myself that there is someone else that can do it better and they deserve the chance or opportunity more than me. If I use just my logic I can tell myself all the things that I could do, but then when it comes to action I emotionally psych myself out. So yes I would love to have a switched that I could flip and turn off the negativity.