I don't think I'd be worried what the nurse told me, but if you really do want to stop, coiuld you maybe replace the comfort of his bottle with another, like a blankie or teddy? My DD (15mths) has her bottle cuddling with me on the lounge and then I rock her for 10 mins with her blankie and then to bed. She's usually asleep by then, but if not she often goes off herself, if not I rock again for 10 mins, to bed atc until she's asleep. Or as someone else suggested give him his bottle sitting up and maybe read a story together and then put him to bed. I think anyway you do it, it will be hard for him to change routines for a few days, up to a week or so. Good luck.