Earthbound angel

Isn't that ironic? I can be happy the whole day, and then two minutes' conversation with my mother can depress me.
Why did she have to call at all? I don't know why she feels she has to carry on checking on me; what's going to happen to me here?
And I wish she could get her head round the fact I'm not who she thinks I am at all. That's why she depresses me and I piss her off, because she has this rosy-eyed, idealised image of me in her head, and when it becomes apparent I am not an earthbound angel, she gets pissed off.
I just get depressed whenever the phone rings and it's her.