What can I do with my mad parents?

Hi. My father lives in another country and he's mentally unstable. He lost his own father at 13 (I'm 15 now) so I'm having the strange suspicion that he distanced himself from me to make me suffer like he did when he lost his own dad. I forgot to mail him for his birthday and now he's all angry and disturbed, telling me "I know my ausence hurts you, even if you don't admit it!". But I always tell him I miss him. And my mother, she studies psychology but projects a lot and thinks I am my father. She even shouted abuse to me once and called me 'obnoxious', but I'm actually much nicer than her. The problem with her is that she seems nice and understanding most of the time but sometimes she goes mad and starts losing control, telling me that I don't love her, and it feels like she was another person... and I start remembering how I told her my most private secrets and now she starts dissing them. I'm glad they're divorced. My dad used to hit her, and the sickest thing is that they're still in love. On the other hand, I may be a little weird or eccentric, but still I'm the most mentally healthy and reasonable person you could find. I don't want to live with my father nor my mother. Help.