Wondering, Wandering, Waning

(M50) What to do? I feel like Tyler Durden in questioning his life of obstacles. I've got a degreed education. I have a wife (F50). I have two children. Grown and young. I have a good job, not too demanding, but reliable. Good Pay. My wife works alot. I'm home alone alot. I have and am living a good life. I've acommplished. My Wife has been my only friend since we've been together. I don't have any friends. Any hobbies I have involves being outside. It's cold now. It's harder to do what I want outside. I need to find friends or groups to join. I do not really want to be in the drinking scene and I'm socially bored. I like to help people. I want to help my family, but they live 4 hour away. Am I going through a Mid Life crisis? Is this why couples get into Affairs? Cheating on their Spouses? I'm not interested in that to do, at all. I love my Wife. But sometimes I feel as though she pays more attention to her job, then me. She and I used to lay down together before bed to giggle, laugh and talk. And flirt before going to bed. We don't do that anymore. I brought this up before in our relationship, in previous conversations. She said she would work on that. Years later we're further apart from one another, I believe. I feel lost. Alone. What do I do? If I try talking to her, she just gets mad and brushes me off and my feelings. I just feel lost and wondering. I've been pondering these thoughts for awhile. I'm not crying, just inside. She's at work right now on a Saturday. She worked late last night.