You feel overshadowed?
If that causes you low self esteem, I think that you should just break free from the bonds; such as friends, family people that overshadow you etc.

Now, I'm not telling you to break all ties, but just grow more independent; throw the past behind you and look forward. Whenever you go out and socialize, you won't remember about those that overshadowed you and they won't have as much of an influence as before.