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That doesn't always happen though. I feel the most lonely when I'm alone with my wife. We can only have a back and forth conversation on topics that interest her, or the day to day of the house/kids, anything outside those things is just never discussed or is a one-way conversation that just dies. I was friendless and grew up with the same 15 boys until the end of highschool, never fit in. Married the first girl who…
She probably sees it differently than you do. Because when she wants socialization or interaction with you, she gets it.
We have differing levels of desire to do things with other people. When we're in a group setting, she's an extrovert - but it drains her. At home she's always been happy with a book, puzzle, or now, doing sudoku or a paint-by-number app on her phone. I find the paint by number app maddening - it'll take a picture of a parrot and subdivide it into thousands of squares. You pick a shade of green, track down and touch all the squares that are that color - and then pick another color - track down and touch all those squares.... She's done hundreds of these and the end result is just a picture on her phone. I suspect autism, but she's super verbal and outgoing which I think masks it.