Maybe you ought not to let that conversation end there, since your feelings about it don't.

You might say, "BF, we need to talk about our relationship. You seem to be assuming things about it that I'm not. Oh, and for the record: You see how much I appreciate your friend's compliments, but you've learned nothing from that. It's pretty bad when I get more compliments from him then I do from you.

Then you need to talk about his apparent assumption that you're "not stupid enough to leave him." Tell him to look around at all the men of power, fame, and money in the world--who have a lot more to offer a woman than he has--who have been left. Dumped, in fact. No man is so good that he can't be left. No woman, either. People aren't perfect, and relationships can always be improved.
Everyone, always, needs to keep that as a working attitude. Also the fact the people in a relationship are equal.