Oh, they can definitely be territorial with humans! Just ask Larry
@Nancy McClelland about their rabbit that doesn't/didn't(not sure which) like his wife, and would chase her from the room
You can certainly get a little bossy boots bun, usually a moody female(saying that as a human female myself)
, that can think they are boss of the home if you don't establish yourself in that place at the start.
But usually because of our size and the way we deal with rabbits from the beginning, of bringing them into our home(our territory), we get placed in 'top bun' category. So they regard us as being in charge of the 'warren' and 'herd' from the outset. But it's worth noting, that grooming hierarchy and herd hierarchy can be two completely different things. So we can be considered 'top bun' and head of the herd, but still be considered subordinate when it comes to grooming hierarchy, where our buns expect us to give them head rubs.
http://language.rabbitspeak.com/http://language.rabbitspeak.com/prove-that-you-love-me/
Rabbits are all about establishing hierarchy in the herd. So you can't just bring a rabbit around for a play date. With rabbits they have to work out where each rabbit is in the pecking order, and this can take time. And even then, some rabbits absolutely will never get along and will fight causing serious injuries, and some may even try and kill the other rabbit. So rabbits should
never just be casually put together. Rabbits are bonded, and this may or may not work, and can be quite the process to accomplish with some rabbits.
If he's neutered, you can still attempt to find him a friend. It's all about finding the right personality match for each rabbit. Some individual personalities just do not get along, particularly two dominant ones.
If you want to try to find your boy bun a possible companion, I would suggest finding a shelter or rescue that has rabbits that are already spayed/neutered, and that allow strictly supervised introductory dates to see if you can find a possible compatible bunny companion for your boy. Then attempt the proper bonding process, or maybe the rescue offers the service.
https://rabbitsindoors.weebly.com/bonding-bunnies.html
http://wabbitwiki.com/wiki/Bonding_rabbits_together