bunny troubles

My rabbit is use to me now,and he likes me. He runs in between my legs,wanting me to play.(sometimes I let him chase me,and run around the house like a doofus ) but I can't really play with him the way bunnies do,so often I just pet him and go about my buisness,which frustrates him,or he sits there dumbfounded.
My sisters bunny doesn't want anything to do with him,and we can't put them together unless we neuter them because they fight. I've heard or people having two uneutered males together before,and having no issues,my friends aunt being one of them.

Is there any way to bond my rabbits? Or bond with my rabbit person to rabbit? Or both?