DS has always been brilliant at going down to sleep. Ever since he stopped feeding to sleep at about 9 months, we just do his bedtime routine (bath, PJs, book) and pop him down in his cot and he puts himself very happily to sleep.
Over the last couple of nights, he's been standing up and crying. This has escalated tonight to the point he was crying as soon as I left the room. DH doesn't think we should go back in: he thinks he's just figured out that if he screams, he'll get cuddles and not have to go to bed. I'm just really reluctant to let him cry, but at the same time don't want to get into a situation where I have to sit with him for ages to get him to go to sleep when I know he can do it on his own.
Room temp is fine, no teething, illness etc.
Help! What should we do?