After that particular encounter he had been weakened. Injured. Not from his missing arm, although that was certainly inconvenient. He was aching, hurting, and torn to shredded ribbons from rejecting the bond.
There were always consequences from going against the kami's will.
This was his.
He had to exist with a hole in his soul. To know she was out there. To know she was his, and yet not.
Because no one could know. He would not allow it.