Berlin is awesome, but it is not the same as the rest of Germany. All in all a good country though, and definitely a place to be proud of.
As for your wish, Bosnia will enter EU sooner or later. You can just go illegal as well. You can live in Berlin for years without anyone asking for ID.
I know that Bosnia will enter in EU, but not soon, probably in 10 years or even more. Illegal is not an option, because if I want to work I can get caught and then I can fall into serious trouble.
Only option is to get married with girl who is from Germany.