H.P.
I second the thought that you coudl adjust to his schedule. I stopped pumping when mine started drinking less. I was only still pumping to maintain my daytime demand for the weekends. Right now, I am BFing on demand only--no more pumping--and he gets what he needs.
I don't think that you should fear breaking any bond. You're still the mama, right? You two have biological ties to need each other and to satisfy certain needs for each other. Trust that those ties cannot be broken, and stay open to other ways that you can get both sets of needs met. The needs change as time goes on, and that is as it should be.