Hey, i honestly think that your boyfriend just seriously isn't into oral sex. The fact that you would gladly and even want to give it to him won't make a difference.

For example, I am severely uninterested in anal sex. If I had a boyfriend and we were in love and he wanted to have anal, I'd say "no." To me, I don't think it's a very loving thing. I think it seems more horn-dog-ish and I am just not into the idea of it at all. If he said I had a beautiful and he loved every part of me, okay cool, i'm flattered, but i would not have anal.

I think your situation is not too common, but I would honestly guess that he just may not be into it and will never be into it. That's all I can guess. Good Luck!