don't feel confident

I used to be pretty confident sexually. I had good sex in casual or serious relationships. I loved helping my past sexual partners orgasm - go down, finger, whatever it took. My current partner that I've been with for a few years doesn't like any of it, and she never orgasms. Sometimes, I feel as if she's doing it out of obligation. I feel empty sometimes that my favorite part of sex - working with the partner for them to orgasm - is no longer present. And that makes me loss my confidence. Am I weird?