What did I do so wrong?

I don't understand why people don't just talk about things that are bothering them? Wouldn't it just be easier to get it off your chest and talk things through? Does no one ever think that if we knew of something we did wrong we might actually want to make it right and be forgiven? Instead people just ruin friendships because they refuse to talk things through. I am trying to tell myself to just move on and not to worry about it but i guess i am just not built that way..hopefully someday I will be able to convince my heart that i don't need friends like that in the first place! Sorry for that rant but i can't get it out of my head and i hope there are others out there that feel the same way.