OK, well done firstly, because it sounds like you have done so well.
BUT......Are you sure you haven't been neglecting your marriage, whilst pursuing this? I mean, it's not something you are doing together, and you sound as though you had a busy life before this.
Do you date? Do you go out for dinner? Do you find time for him? Do you spend the evenings together? Do you have sex? Do you have weekends and holidays away together? Do you switch off and let yourself drink wine and have treats, or have you become boring (to him)? Do you talk about training incessantly? Do you ask about his life? Do you come across as smug because you've got fit, and he hasn't? My hunch, is that he feels completely left behind and forgotten, and this is the straw that broke the camels back?
It depends how important this marriage is to you, but I think if you cherish it, just take a day or two, to really think about this. How would you feel, for eg. if he had a hobby that took up the same amount of time, and you were in his shoes.
Personally, if my DH took up training to this level, I think I'd get really bored by it, and would probably resent the time it took up, and I would miss the old version of him, especially if it meant that we suddenly could have take-out or drink or do any of the "unhealthy" things we used to do. If he then was going to rank it up another few notches to competitions, I can see how I might snap.