So what I've gathered from this is that you're extremely good at generalising.
'I don't associate with black British as I dislike their style and don't consider myself black. I also live in a middle-class area and so there aren't many blacks of whom I can associate with anyway. I feel that I fit in with white people better.'
As a black British person, I find this rather offensive. Firstly, what 'style'? There's a whole spectrum of black people- you cannot just group them all under one 'style'.
Secondly, you're implying that black British people don't live in middle-class areas. A lot do, actually. I live in Oxford, which is about as middle-class as you can get.
'I personally consider myself white as I believe if you white in you then you're white.'
I could easily claim the same thing. I was born in England, raised in England and the only language I and my parents speak is English. However, I don't because it's clearly incorrect. White is not a race, it's a skin colour. Your skin is not white, so you are not white. You are black/mixed race or whatever you want to call it. In the eyes of most white people, you are black. I think a better think to say would be 'I don't consider myself to be African'/'I consider myself to be English'.