The message of the backhanded compliment could not be more clear: stay away.
“You’re my favorite.”
Turn and run. Seriously. Put no stock in that person’s appraisal of you and your abilities. Assume that his preference for you is based on whatever issue he has and not, as he would flatter you to believe, in some superior skill that you possess.
Also consider that the others who are not her favorite are very likely having an impact you’re not, giving that the likes of this person, who traffics in backhanded compliments, doesn’t like those others as much. They’re probably pushing and challenging in a way you’re not. At least not yet.
There are few curses more serious than the backhanded compliment.