Cast aside your envy. Stop wishing you had what others have and work on achieving what you really want. The feelings of bitterness and resentment that come along with jealousy will only make you dislike yourself and wish you were someone else. Cast aside envy and work on what will make you happy.
Believe in your choices. If you want to respect yourself, then you have to believe in the decisions you've made. You have to be firm in your beliefs and make an effort to understand yourself and to know what will really make you happy. Give yourself the reward of a decision well-made and stick to it, no matter how difficult it may be.