Has your hubby tried to make friends through the cage bars? Giving him treats - only he feeds him only he changes his water etc....
I know what you mean about being biten - but if you press into the bird as in if he bites your finger - instead of tring to pull away just push into him - yes it does hurt but once most birds realize its not a game and he wont scare you away with his bite - its not worth biting!!! No reaction to his bite is not what he wants...he wants you to run away and scream etc...theres the fun!
Ignore the love behaviour - dont show him you like it or hate it - just ignore him and when he stops reward him with praise or treats....its a slow road with greys but they do learn behaviour good and bad LOL