Hi Submissive.
To me, I have to wonder if there's some compatibility issues with you and your boyfriend...he sounds, by all accounts, like a wonderful guy based off everything you've said, but to me, it sounds a lot like there's some very significant differences in your day to day behavior and sexual preferences.
He might be a great guy, and you absolutely deserve a great guy, but you can't sacrifice The Submissive in a bid for this guy, you know? A good, long lasting relationship still has you being you, with the wonderful guy still in the equation.
Big Mama offered really good advice though...why not try to gradually build him up to some more "exciting" things?
And please do talk to him...I know you said he hasn't taken seriously talks like this in the past, but it's not fair to you (nor him) to have you unhappy because he can't meet your needs out of not knowing them.
I hope things turn out well for you Submissive. God bless.
Harley