He may have something there he does not wish you to see. He may also not regard himself as your boyfriend any more.
Your best bet is to simply ask him. There aren't any really great reasons for you not being able to see his Facebook account.
Your boyfriend has blocked you on Facebook because he does not want you to see some of his posts. Chances are high that he is cheating on you.
If you really want to know why your boyfriend blocked you on Facebook, is to ask him. He's the only one who knows the real reason.
Facebook is not blocked anymore.
I only know that Facebook is blocked in China
you cant as they blocked you however you can if you blocked them first
you cant
you dont
how do I get into my wife`s face book if she blocked me.
you cant
CHINA
because its blocked
then you would get blocked from facebook.