Hellu, I saw what you wrote and eventually found myself figuring things out for you, I spent like sixty to ninety minutes on this but I felt like doing it anyway so lol
I started with getting all the information I could and rearranging it into something that makes sense. So yeah, after reading and especially UNDERSTANDING all I wrote below you should have a different perspective on things (or I hope at least lel)
Click the link on Orange and tell me if I were right in assuming this personality colour :$ 🙂
Some of the things I wrote may be controversial or straight-up ignorant of any human feeling, just know I don’t mean anything bad by it, I was just trying to right everything as clearly as possible 🙂

Orange
http://www.empower-yourself-with-color-psychology.com/personality-color-orange.html

Interaction, activities: LOVE

Her: sitting at home, bored, lack and need of socialization, no available contact, stirring crazy
(Aspect of Orange: being acceptant of people just the way they are)

Him: (presumably: workaholic, lazy) works loads [why idk], no need for more intimacy, close-minded, stubborn, not easily persuaded, doesn’t like to try new things (sits in front of tv duh :p)

Base of the problem: need for social and physical challenges – UNFULFILLED
No solution is popping up by itself, linking to that the situation is serious (Stand-off)

Asking for help on a public forum rather than to the man himself: no direct emotional expression
It’s all good and well asking to do things together, but does he know your stirring crazy? To the point where you would, after yet several years, would consider leaving him? Does he know?

Categorization: Gnawing Need –> Solution must be found
A gnawing need problem works its way to something inevitably bad bad

Visible solutions
Divorce
Continuation

Not on a option (in order of importance)
#1 Continuation (Living with gnawing need just simply doesn’t work)
#2 Divorce

Attempts for change
Asking to do something together
Asking to go out and drink something together
Mentioning reliving holidays, talking about holidays
Time period: quite long really…

Eye to eye: Low to Medium

Obvious solutions: Tell him that you’re not asking this without a reason, point out that his behaviour causes you much inside fraying, that you feel you can’t live with it in time, at which point all things come to a close anyway
Something has to change in his way of living!!!
It also seems he’s not aware of your feelings, make sure he cares about them

I would say if I were God, give him a job with less work for one.
And have a family planning, so you two can plan fixed activities that you have every a week at a fixed time. This will at least give you something to look forward to :/ which will reduce the gnawing, and that will do for now.
But you need to change your relationship as a whole, sacrifices are going to have to be made, so don’t ignore that fixed fact.
By that I mean he’s going to have to change his attitude towards new things. And although this never happens.. you need to take charge more. He needs to start listening to you.

But anyway, start with having one weekly activity that you do every week together, start with that.
Alternatively you can find someone new, but suggesting it I mean.. who am I to suggest, right?
Eight years might be long, but trying again can be easier in some cases, though from what you described I don’t see why that should happen 🙂
It’s a last resource.

Hope this helps, cheers 🙂