who do you think deep down is nicer, Damon or Stefen because Stefen killed the girl Damon truly loved but Damon is not being selfish and letting go the girl that he loves so she can be with Stefen, but what do you think?

Idk but I think damon is nicer

Yes, who did Stefan kill that Damon loved?

Anyway, in response to your question, I don't know about who's nicer. But I really prefer Damon to Stefan. Not because of his "eye-thing" and not because he looks hot or whatever, but because he has some semblance of a character. Damon is more human than any other character. He's flawed and coping and denying and despairing and fighting back with every defense mechanism he's got. He's more real and relatable than Stefan is and ever will be.

Stefan on the other hand is just a self-righteous martyr jacka**. He and Elena deserve each other.