Although I have no official diagnosis other than depression, my friend thinks that I may have dissociative tendencies rather than full on DID.

Is this a thing at all? I don't know how it all works :/

It's because there are a number of gaps in my memory, but according to various friends I've not been acting out of the ordinary, so it's more akin to memory loss.

I'm not really sure how to explain this from my own point of view, but then, I'm not really sure I understand it at all myself anyway.