This isn't a sign of an aggressive dog, its the dog clearly taking dominance over you. You should start NILIF training and make sure you assert your dominance over him at all times. You should be the one to feed him and do all the dog chores. If he is on the bed it should be by your invite only, and you should periodically tell him to get off just to show you are in control. Same as in furniture, tell him in no uncertain terms when you want him to get off, and sometimes just as a reminder even if you aren't planning to sit there. If he is in your way in the house you should also be able to just nudge him out of your way without fear of his biting, you should never go around him or accomodate him in the way. This all may sound like bullying, but really its just you taking an active role in being dominant.