If my dad is black and my mum is Asian does that mean that I am gay?

Sure.

Yes, almost certainly that's what it means.

"Black" is a perceived skin colour and says nothing about your origins. "Asian" is a meaningless term for someone from one of forty or so different countries in Asia. It is not a skin colour, a race, a nationality or an ethnicity. Your origins or perceived skin colour have nothing to do with your sexuality. Perhaps you need to go to a reasonable school where you might get some semblance of an education.

Obviously not! You are racial blended, and that actually makes you superior to most.