I'm born and raised in Belgium and being a gay teenager hasn't been a problem for me yet. I think Belgium and most of Western-Europe is like a gay heaven.
I have to say though the phenomenon gay-bashing, that has been coming up the last few years, also in Brussels, Belgium, scares me. I don't want to be racist, but it's a fact that most of the gay-bashing in Brussels was done by imigrants, so I'd suggest not to defy them.

Transgenders are completely legal here, but it's not that accepted among Belgians. I actually think it's more of a taboo.
But the transgenders here don't really care.

This is how I, as a young Belgian, experience it!

Piet