I sympathise, as I'm frequently in the same position (corporate law 'widow') in my case. Nothing remotely fishy about it, except my dh doesn't pretend to be unhappy in his job....he loves it, and I'm delighted for him :)
That doesn't mean that neither he nor I get rather despondent when he doesn't make it home (heck, he's my best friend and we miss each other....) but it's a good sign, and means his career is going well. It's a balancing act - he never ever gets home to see the dcs in the evening anyway, but they (and he!) get a bit miserable if he has to leave before they wake up more than 2 days in a row....
What do I do? Well, I work ft, and almost always have tons left to get on with, so that's one option. If the aupair is in anyway, I might go out or go to the gym but on the whole I don't want to go out again after a long day in the office and 30 mins dcs bedtime...
Most days I excercise on the xbox, catch up on some chores or batch cooking, call a friend for a lengthy chin wag, have a 2 hour long hot bath or watch some crap tv that dh would never agree to.....:) It's a rare evening I don't have plenty to do.
Yes, I got a bit p-d off with dh last week when he very nearly bailed on long standing dinner plans, but that was because the couple we were meeting were already en route; most of the time I take the view that getting upset or cross would imply that dh was doing it on purpose, and i know he isn't/
So I think Y probaby AB a bit U, although it is understandable if you've been looking forward to seeing him all day. If it is really getting you down, on a regular basis, then you need to have a proper lifestyle chat about it, or you need to come up with a list of alternative activities that make you happy and don't require planning (see my list above!) so you can revert to Plan B without feeling short changed.