Is Flemish your native language? Otherwise I assume you would be fluent in French!
I visited Brussels once. (I went to the indoor tennis tournament, there used to be one). The hot chocolate in Belgium is to die for.
No, but I was born in Belgium (Brussels) and I've been to France many times. I have a couple of Parisian friends that I keep in touch with - we actually write letters to each other, which is great for my French.