The comparison to a child losing interest in toys... spot on.

That's how I feel about everything lately. I try to do things I once enjoyed. I try to feel happy. Only I can't. I open WoW and find myself sitting in Orgrimmar (that's one of the faction's main cities for those not in the know) for several hours because I just don't want to do anything because none of it's fun. I try to read and read the same paragraph 10 times. Because that's not fun. I try to write and only get out a sentence.

It's like when my imaginary friend "died". It seemed so insignificant in the greater scheme. But after he stopped coming around, I knew something was missing. I just couldn't care.

That's depression. Everything seems insignificant in the greater scheme. But once you stop feeling, you know something is missing. You just can't care.