School, Blackjacks and Some serious issues lol

SCHOOL BEGINS! and i'm ready for it, these three weeks will zoom by fast, and i am one to want to be really prepared. Ok so besides that i have this Blackjack 2 and i'm in love with it, it will be my business partner until i can updrage to a blackberry ;D. Anyways, something that is bothering me the most is people, specifically those that believe they know everything and that they should tell everyone that they do. It's disturbing to me how, people, specifically females can flip flop between friends. They dog their first friends out, when a misunderstanding happens that they dislike, or feel threatened by and never speak to them, but have the decency to speak about them. Then 'poof' they're cool again! How do you do this? I'm confused, I've been through this before, and I've picked up on these peoples (lol) pattern, and it's not a healthy habit. Be consistent, its scary to me, because I know nothing about this, I know how to be true to my friend, I speak the truth, and yeah we may not agree on something or we may fallout, but we don't just fall off the map, and then mysteriously hop back on it again. Idk, it annoys me, how people never really see the true person until they have to deal with them directly. Everyone can be buddy buddy or bff's , biffles, until they have to stay with them, or directly deal with them, and if you can't hold it out through it all, then what kind of "bff" are you!? A "friend" of mine told they that they can't keep up with me anymore, and their tired of having to figure out whats wrong with me...then what kind of friend are you to me!?