Did you ever end a relationship without saying good bye?

I know that some of us have had internet relationships of some significance that ended abruptly when one person stopped writing back without notice. The question left in my mind was why? Why stop without saying good bye, at least?

So if you ever ended a relationship in this fashion, can you tell me what was going on in your mind? Why did you end the relationship? Why did you feel it unnecessary to say good bye? Did you have no need for closure?

I’m just curious. I realize everyone probably has different reasons, but it’s a mystery that I think about from time to time, and while I’ve long since moved on, I still wish I had some clue as to why it happened that way.