Love to give ten times as much as to receive sexually

I'm unable to come up with a compromise with my partner over this. I love, love, love to GIVE. It makes me feel like a LOVER, a chivalrous and romantic knight in shining armor. My girlfriend loves it. I just don't have anywhere near the same "zeal" for receiving, and I think it hurts her feelings. I don't ejaculate easily, and it appears that after a few minutes, her efforts are no longer enjoyable, but she labors, and feels obligated.

Does anyone else here have an example of how you agreed to be the giver, without hurting your partner's feelings or self-esteem? I'm in love, and I'd rather die than hurt her.