It's working. He tried to bite me earlier and it stopped him. [And that's a fact he's not telling anyone else, not even Jack.]
He knows what he's missing, and he wants it back. He didn't mind having me around, either, but I think it did make things harder for him. I don't know if it might be easier with you or not. [If Spike is having a hard time controlling himself then yes, Ianto can admit he's probably not the best person to be with just now.]