Maybe it's time to start trying to settle himso he can go to sleep by himself?
DS's hated being left to go to sleep on their own, but DD loved it - it seemed to be a relief for her to be put down in a quiet dark room buy herself. (But then whith 2 crazy brothers I'm not suprised)
Well it's a tricky one. I go against the guidelines completely - DH does shiftwork and DD1 slept like a dream. So much so that when he went back to work at 6 weeks DD1 went into her cot in her own room. I couldn't sleep at all with her in with us and she slept so well there didn't seem any point waking her with DH alarm at 4am. She settled in her cot easily and has always slept well.
DD2 went into her cot in her room at that age as well, as it had gone so well with DD1. We leave all teh doors open so can hear as soon as they snuffle (I think BF makes you sleep very lightly) and it all seems fine.
I know though that advice is to have them with you in the room until age 1.
I suppose my point is that IMO if there are no risk factors like smoking then the chance of something bad happening is so low that a compromise is something that can be weighed up. So for you to be downstairs with your OH for a couple of hours and probably poking your nose in every 15 mins and having a baby monitor might be worth considering, but only of course if you're completely comfortable with it.
(It's sardine/spam here by the way I love a good name change )
The thing I never understood about the whole thing is that people take the advice that baby should be in room with you at night. But presumably the advice applies just as much for naps in the day - but people seem much more relaxed about that. Or maybe I misunderstand the advice, anything's possible.