I don't get it...Why do people bottle stuff up inside and let it fester and fester and fester, telling themselves "Oh, it doesn't bother me." and then all of a sudden they let it blow WAY out of proportion and they end up exagerating the truth and making things up out of spite to hurt the other person? And they blindside the person, too...so they have no idea it's coming and all they can do is just sit there with their mouth hanging open thinking "WHAT?!? Where is this coming from??" and they have no thoughts in their head because they are just simply SHOCKED at what they are hearing and the next thing they know the conversation is over and when they finally get a chance to think about what happened, then THEY get upset because a GREAT injustice was just done to them and they were blamed for things they didn't do (but actually started doubting their own innocence because of the sneak attack) and were told they "ALWAYS" act negatively when in actuality, they do a LOT of great things for that other person but that other person was BLINDED by their anger that had festered and could very well have been a simple little sliver...and the attacked starts to think about all the horrible things that the attacker has done, thinking "well, she thinks SHE"S so perfect..." and things start to spiral downward and downward and downward and the emotions just slip further and further and the pain and the unworthiness and the "fine...that's how she feels, I'll just quit. Obviously I suck." And instead of 2 people being friends...you end up with 2 people feeling super crappy. Or maybe the first person feels better for unloading, FINALLY, all the crap she's been holding on to for the past 4 months...the crap that "I can handle it." that was all just little pidly stuff when it happened, but she let it fester and grow and now it's a mountain and it just RUINED someone because SHE COULD HANDLE IT!
I don't get it.

Either let it go...
Or talk about it immediately.
Don't let it fester...because it not only ruins you, but it truly can ruin someone else and that's just not fair to the other person...especially if they never meant to hurt you in the first place and they never knew that little word or action bothered you because you laughed about it every time...you joked right along with everyone else...that's not fair.
And whatever you do, don't talk poorly about that person behind their back when they think you're their friend. That's how you kill someone.