B.C.
You can drive his truck can't you?
People at the tree places will tie it up there for you, and Hubby can help get it down when you get home.
I think you need to start doing things like this:
"Honey! We're going to go get the tree now. Do you want to come with us?".
Then let him say Yes or No.
And you accept which ever it is.
If he says 'No', then you say "Ok! We'll miss you! See you later, Sweetheart!".
You give him a chance for inclusion - then he makes his choice - then you abide by it.
Same thing for the movies or anything else.
You can't make him want to be the husband/father you want him to be.
But you don't have to let his behavior get you down - you go out and have/make family fun anyway.
If he spends all his time alone I'd worry if he's depressed.
You might try and get him to go see a doctor for a physical.
If you feel you and he are drifting apart, some marriage counseling might be a good thing, too.