I do this too, alot! I can spend hours ruminating about a situation that happened in the past that hurt me, or that i have regrets about, and analyze the whole situation in chronological order a step at a time - replaying the whole thing in my head.

I don't know why i do it because i have already ruminated on the same thing many times already, and doing it again does not bring me any more understanding or answers than i had before. All it does is eventually make me feel extremely tired and have a slight headache.

I don't know if it's an OCD-type thinking, or if it's just that i have an extremely hard time accepting situations where a person has hurt me badly, and I never understood why it happened, and never had the opportunity to talk it over or find resolution. Not really understanding why it happened, or having any closure, makes it almost impossible for me to let go of. Yet, without the other person's input, i will never have the answers I am seeking.

Yet some part of me thinks that if i just analyze it one more time, maybe this time i will understand.