If he wants to change, then I would expect it's time for another appointment to discuss it.

Now... seeing as he's lied about taking the pill when he wasn't.... is there any chance at all that he's exagerating what he's feeling while on the abilify to strengthen a reason to go off it? Kids can be pretty clever when it comes to things like that....

I'd try just talking to him and reminding him that he if really, really, doesn't like a pill he can talk to the doctors about it and see what they say... but that you, nor your H, nor him, are doctors and can't pick and choose on your own like that.

I wonder why he was so opposed to even trying the Abilify though?