Friends come and go

Recently met a new friend five months ago. Became close. All of a sudden I have noticed jealousy out of her. Example; when we go out she expects all attention on her but im a social butterfly and I enjoy people. One day I was communicating with someone she decided to not be friends with ( not my problem, but hers) I look over and she disapeared. She basically left without saying goodbye because she was mad. I don't tolerate with people like that and when she did that I was done! Haven't contacted her in sure she wants me to kiss her ass but I won't....but seriously there was no need....swear friends come and go....dislike friendships like this...can anybody relate??