It has been almost 15 years since my divorce. However, it really does not feel like it has been that long. I am guessing that it is because my ex-wife keeps showing up in my dreams. When I wake up from a dream episode, it takes a few moments to distinguish between the dream and reality. That is probably why the divorce seems so recent, when I have not had contact with her for over 12 or 13 years. I tried to talk to a therapist about this but we did not get anywhere before the therapist went on maternity leave.
My ex-wife got remarried quite a few years ago. She probably does not think of me at all.
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Another recurring dream is taking a final exam but not having attended any classes for the entire semester/quarter. I have this dream almost monthly, and it is always a social science class like history. Maybe that is why school does not seem that long ago either, even though it has been over 25 years since my last college degree.