Obviously if he's had a long day, been up early, been to the gym and then comes home to food and a sofa he's gonna fall asleep, anyone would.
Change the routine cos it's not working for you... tell him to not go to the gym after work and take him out to dinner, even if you're a boring couple, boring couples go to dinner too. Get a few drinks down him take him home and ravish him. You get some attention and you may have a chance over dinner without him asleep to tell him you should spend a bit more quality time together and change up the routines a bit.... he might feel it too but you havn't got round to discussing it with each other.
The other person who said get him to go for a nap when he gets in then get him up sounds like a good idea... I know quite a lot of people who need to have a nap after work so they can enjoy their evening. Worth a shot?!
I'd feel totally neglected in that situation too... don't let it continue