"I like you. People say I've got no taste, but I like you."
He must be getting confused whether you're appraising or insulting! Whatever but it is something on which we can laugh on.. You can use it in deriding that backstabber. It really works like a sweet knife. It's a decent way to pull their legs. They won't be understood that how to react on above sober punch. Oops, by the way do you really like them!