and depressed?

Question

and depressed?
For probably a years I have been feeling increasingly depressed. There has been no trigger for the depression to start, nothing bad has happened to me, and yet I feel so unhappy. My depression is interspersed with extremely happy moments, almost too happy, but the depression dominates. I get irritated or tearful very easily, it takes nothing to make me cry. I dont want to meet my friends anymore, I have completely gone off food, I dont have a problem with my weight like anorexia or bulimia, I just never ever want to eat. I either dont need any sleep, or need too much, I can no longer be bothered to get up for school, around times since September I have pretended to be physically ill because the thought of social interaction is just to much, and I have contemplated death a few times, but have never actually attempted to end my life. I dont self harm and I havent tried to. I am scared to speak to my parents, as my sister is dyspraxic, and my parents always expect me to be the normal one. I have told one close friend that I have been feeling depressed, but I couldnt tell them the extent of my depression, I made it out to be much less severe than it feels to me. I am scared of seeking medical help, as I am scared of my parents reaction. I am only and I feel like my life is falling apart around me.

Answer

Sounds like Bipolar Disorder