Good grief. You just wrote an entire article about me. Almost everything you said describes me to a T, except that I did well in high school despite my best efforts otherwise. But everything else fits perfectly. I hang my head.
I have had several committed relationships in my time, including 4 marriages that of course ended in divorce. And most of the time it was me ending it, for reasons that I can’t recall later. The last time broke both of our hearts. And I never talked to them again (except my last one, perhaps I have evolved a little). And the weird thing about it is that I know all this, and even warn them ahead of time. Each thinks it will be different with them. It isn’t.
I am firmly committed to avoiding relationships in the future. I am old enough so that it is not that big an issue. But I have realized that I am incurably relationship-dysfunctional, and don’t want to put anybody through that again.