Is national identity a kind of self identity or social identity?

Identity is someone who looks like someoe else. And i don't want to tell you the rest. if you want a proper answer go to define:Indentity.There you go i just helped you, ain't you lucky you lucky...

This question lacks a verb and a subject.

is self-esteem similar but different from identity?

it was developed by Herni Tajfel

Identity vs. Self Diffusion: the accrued confidence that one's ability to maintain inner sameness and continuity (one's ego) is matched by the sameness and continuity of one's meaning for others