why are friends like belly buttons you really only have one a whole lifetime!!!

why is it that as many people that you meet in this whole wide world ,that we can never really make true and ever lasting friends.i mean dont get me wrong we all have friends but sometimes it just seems that we cycle through our so called "friends" and it seems that you can only have one at a time. no matter how hard you try it just seems like you just cant keep them around. well and a big factor is if you are like me and your friends are your life (friend needy) i love hanging out with new people or in big groups!!! and i know i am not always a good freind and i dont always treat my friends the way they should be treated (which is sometimes a good thing lol) so i hope to make many more friends and keep in close touch with the ones i have