Oh boy Gimster, I can relate. I had to deal for a long time with an ungrateful person in my own family. The more I gave, the more ungrateful he became. In fact, the more demanding, and insistent he became.

Then I read an article that that's often a normal reaction from people on the taking side (especially from the male gender), just because they hate being there, and It's often the last thing they have left; a bad attitude shows their independence. That made a lot of sense to me and helped me feel less bitter about his manners.

A few years have passed, and I don't expect any thank you's, and he has found his way in life. And we have found our way to one another again. Happy endings do happen. And Gimster, being disappointed that someone neglects to thank you is not narcissistic; it's normal.