What's the big deal?

When something's really bothering me, I tend to keep it on the D.L. until I really find it necessary to tell people about it. This backfired on me today. And it sucked. I just don't understand how things build up, y'know? Like, if something's really bothering me, I don't understand why if I don't talk about them they just build and build, and then I flip out for no reason. It seems like I'm overreacting when really, I'm just giving you every blow right away. It's like, when you record your favourite show during the week on Tivo, but you don't have time to watch it everyday, so you wait until Sunday. After watching your fourth episode, people tell you that you watch it too much. It's not that you watch it too much, it's just that you haven't watched it in so long, that you have to get such a big dose of it.
That's what it's like, and I get that. I just don't get how it does though. I don't understand how if something is bothering you, that you can just keep it in. Isn't it human nature to talk? I thought it was. Maybe that's wrong. LOL. Probably. Anyways, point is. I understand why you have to burst, and I understand it when people do burst, but I don't understand how they burst.
Y'know?