Hi Rosebud, I have another idea
Maybe he is being this way becuase he has lost some passion in his life or no longer pursues things that he felt passionately about in the past? (Because there is little time for that now or becuase of the responsibillties). How well do you know him? How well do you know where his passions and affiliations lie? Who did he reall really want to become when he was still a teenager? Myself, I wanted to be a rock star. I made my own electric guitar and decided to take over the world with my music (Surprsingle that never happened and I pursued a career instead).
But speaking from personal experience. Being served dinner by a naked girl maybe an interesting Endeavor , but for me personally it wouldn't compare with the intimacy i would feel if a girl I am with asked me if she could write a song with me. Just for her realising that this is my long time passion, would make me look at her as something special. I think every man is like that. Every man would be passionate about something, be it sport, or music, or war history or stock market. Maybe if you can find these passionate sides of him and make an effort to join him on them he will start looking at you not as just a partner, but also as a soul mate? And with that outlook change maybe other things will follow...
Just a suggestion, what do you think?
Don't cry, don't regret and don't blame
Weak find the whip, willing find freedom
Towards the sun, carry your name
In warm hands you are given
Ask the wind for the way
Uncertainty's gone, your path will unravel
Accept all as it is and do not blame
God or the Devil
~Born to Live - Mavrik~