TUNE THEM OUT! People that intentionally bring you down are merely people that do not have confidence in themselves. They want to be able to be as confident as you, but can't! They don't do anything for you, so therefore do not pay them any mind. Brush yourself off and continue heading towards the road of success. "Confidence = Success. I did the math" ("Mike P" Fellow Blogger).
Having confidence in one self is the best feature a person can have. It shows that you have great character and are determined. Put it this way; would you want to associate with someone that is always down and negative OR with someone that knows what they want in life and are positive in every aspect? Be that confident person and know your worth. We all have a purpose in life and it is up to us to figure it out. By having confidence in yourself you are more than likely able to find this purpose much quicker. I say this because in having confidence you are not afraid to go out into the world and get what you want. When you know what you want you go for it. That's a good feature to have and you will be rewarded in life.