My son is 4, he has some sort of imaginary friend although she seems to be more of an emotional punching bag and i'm just worried. Apparently shes only small and i found it quite weird that it's a girl he has made up in his mind, because i remember having imaginary friends and they were all girls and i knew my brother had them and they were all boys. But he is constantly telling her off for playing with his toys, using really aggressive tones and "telling" on her. I try telling him to be nice to her because its nice to be nice to people but all he says is ok and then when i'm out of the room he does it again. I do find he does it more when i have just told him off, usually for not helping tidy up or throwing things etc. but i don't bully him or anything like the other reports on the internet say. I have asked his pre-school but they say everything is fine and if there is a scuffle then apparently he stands up for himself. I just don't know if it's something to go to the doctors about or i'm just worrying about things too much.