Cooper was like that - when we got him he kept to himself, hated being held, never used to stay on my lap. Was a terrible hay eater and barely touched his veggies.
I then got him a friend who I kept seperate as they werent neutered but they saw eachother through the cages and he completely changed. He loved stretching out on my lap getting pet, hes a great hay eater and chomps his veg now quickly and he loves attention.
Sadly the bond didn't work so Coopers by himself again, but hopefully he will be with Willow after she gets speyed.