So what you are saying op is that you don't want to go out more often, you are happy with a quieter life you would like more affection.
Well that is easy, make an effort and have a romantic evening in with gorgeous food, fine wine some pretty pants (even if you have to buy them!) start to reconnect with your sexuality and when the evening is over, ask dh to organise the next one put in the diary and remind him a few days before to organise the dinner. Every fortnight do the same.
In the summer you can sit on blankets in the garden, star watching.
Turn off the TV, no screens and talk. Talk about the future, talk about the lack of sleep, talk about how much your marriage means to you.
The only way you will fix this is by telling how much you need affection in your life, and show him how you want to be held, how you like to be kissed.
We all have peaks and low points, a long marriage will see plenty of excitement but always stagnation.
If you want your marriage to work then start by being affectionate and open with him. Kiss him, hold him, and don't be afraid to initiate the affection and love. Someone has to break the rut, and as he sounds to so dead tired you need to be the one, on this occasion to make your marriage better.