I assume it is menopause anyway, I hit 50-55, and suddenly, I needed to be by myself. This is after 28 years of marriage!
There certainly was a lot of other stuff in our marriage to cause issues, but the one item that stands out is that I want to sleep alone, I want to have my own bedroom, and I actually want (and have) my own house.
I distinctly remember a time when I specifically didn't want to sleep alone or be in my own bedroom - I always wanted a room mate pre-marriage, and it was always important to know that I could reach for my husband's hand in the night.
Any thoughts? input? Is it just growing up and accepting who I am without fear? Or is there a hormonal basis for the sudden change - survival of the species hormones kept me needing to be with another and once that hormone was gone, the need went as well?