Puppy sleeps at night in a crate happily but only if I'm in the same room. He's in the playroom/spare room so there's a bed in there which I started sleeping in on the first week we got him. He settled in really well to the household generally and is confident. Could already go through the night at 9 weeks. I tried leaving the room after a week but he cried for about 3 hours. I tried a second night and again he was crying and howling. I then went back to sleeping with him. Now it's been a month and I really need to get him happy on his own. Any advice? I've been variously advised not to leave him as it makes him stressed and to leave him as he won't learn to sleep alone otherwise. Worried I've got him into a routine that I can't get out of. I tried sleeping there for a few hours and creeping out but he wakes anyway in the night now and again and realises I'm not there so starts to cry.