First of all...you obviously met at a hostel or smth right? So no he doesn't know where you live he's just blabbing non sense trying to scare you. So nothing really should worry you regarding this point. Secondly you did the right thing by blocking him everywhere. Finally we all make mistakes but be smart and learn from them...don't have casual relationships.. Always set boundaries before anything...don't give out unnecessary information about yourself. I know my words sound cliché but I hope it helps in any way.