He is a manipulator of truth.

[Though Inias can see Gadreel has kind of figured that out for himself via personal experiences, it should probably be reiterated]

He is selfish, and only considers himself. Were he truly apologetic for what has happened to you, he would do something about it, and pursue Naomi. But he has not.

[To his knowledge, anyway, though the two of them punching each other would be great Pay Per View.]