It means for him "The Demon loving himself" the symbol that he doesnt belive in anyone expect himself and that he lives only for himself
He wanted to feel he was loved. Garaa was once a sweet innocent child. This is why I am glad he isn't the jinchuuriki of the One-Tail. He is far better without it.
n__n
Jinchuuriki of the one tail? Is that the big demon he turns into?