I do the same. I'm always complaining about my son being sick and not knowing how to help him, money, work, the demons in my head and my other problems -- that I may be willing to share, of course. I bitch about my problems so much that my friend Leia (psychologist, no less) must get tired to read the same crap in lots of my emails and hence doesn't respond to them at times. Well I wish that the latter were completely true, but she's up to her neck in work. By the way, I truly appreciate lending me her ear to tire with my issues and she knows she can do the same (again).
As bad as it may sound, we all do the same. We all hold on to a rant for days, months or years. We bitch and vent for as long as we hold on to those rants (pains), but we often forget when to let them go. It may even become a bad habit that may take a long while to unlearn.
On a personal note, I still hold on to some issues that I've had with some people for over two decades. I know it's not healthy, but betrayal (any form or level of) and teasing hurt for as long as we don't let the open wounds scar and eventually heal.
* Hey kiddo, I'm sorry if my comments hurt your feelings. Sometimes you can only let go when it's time to let go.