Loneliness Support Group
Loneliness is an emotional state in which a person experiences a powerful feeling of emptiness and isolation. Loneliness is more than the feeling of wanting company or wanting to do something with another person. Loneliness is a feeling of being cut off, disconnected and alienated from other people. The lonely person may find it difficult or even impossible to have any...

But I did have a near-marriage once. I sure wanted the house to myself sometimes, just to watch TV and brood.
Is there any way you can set up one alone day, one couple day?
Also, my ex had a few gay friends, and they made much better companions for Saturday mall shopping. I could stay home guilt-free.
If you can think of the most interesting activity that you and he love and can do together, would he show any interest at that point with you alone? If the answer is no and if you have already tried this a couple of times, I think marriage counseling is your best bet. It may be your best bet anyway. I don't like to see marriages end and I hope this can be worked on between you two. Share with him an activity that you have tried that you really like. For example if you tried kayaking, go on a kayaking day trip together. If that doesn't work I would consider marriage counseling.