Is it normal to have Imaginary friend's?

im 13 im a girl im happy i have loads of mates . and i also have my imaginary ones now i cant see them !! im not crazy thay r just my imagination iv had them sicne i was like 6 most of them from tv prorgrams or evan cartoons but i find it hard to get rid of them and i think its because iv had them for so long iv become very atached to them and also i have ones iv made up .. like sam or katie < there vampires xD .. michael and junior are brothers :P ok any way in my dreams we r all like best friends and stuff i lucid dream as well ( if you duno what lucid dreaming is its when u can control your own dreams + be aware of the fact you are dreaming ) ... we might get into trubble or just go on holiday simple kool dreams .. ok , is it normal to still have they imaginary friends ? if not how can i get rid of them :P x