Looking for help. ...not 'officially' widowed...but living like it.

Is there a place where someone who is living as a widow (but they still have a living spouse) might find compassion, understanding and companionship? My cousin is only 55. Her husband has advanced progressive MS and has very little quality of life. He can do very little independently. She is his full time caregiver. He goes to sleep every evening at 6 or 6:30. She is very active and busy in the daytime when she can be. The evenings are long and lonely. He doesn't converse and has significant cognitive impairment. Surely there are others who find themselves in the same situation and desire someone who understands and is compassionate just to be a friend. Someone who might go to a movie, share a dinner, a game or just friendship. Is this a place where such a group might be to help others in this situation find each other, ???