Sorry if this sounds a bit harsh, but you can't expect to break a habit like this in a 10-month old without some degree of crying. That doesn't mean you have to do CC, but if you don't want to co-sleep, and you don't want to be in and out of his room all night, then at some point you are going to have to leave him to cry.
We had terrible problems with DS sleeping, and after a spell of cold/cough/teething, which at this time of year all seem to run into each other, and during which I was always a bit "soft" on him at night, he'd be dreadful. Up every hour! I know what you mean about not being able to see CC through - you're probably so knackered that you can't even think about a night of crying - but you are going to have to think of a strategy that you feel you can stick to, pick a time to do it, and then be brave and do it!
I got DH to take a Fri and Mon off work recently so we could deal with DD's night time antics (7 months) without me feeling guilty at DH traipsing off to work knackered the next day. That really helped.
I recommend Richard Ferber's excellent book "Solve Your Child's Sleep Problem", which ofers a variety of potential solutions, which you can tailor to suit your needs and expectations.
I would also say, don't expect your baby to sleep 7pm-7am. Because all the books say this is "normal", and most of my friends' babies did this, I always thought that until DS did it too, I had failed somehow. He is 3 now and sleeps 8pm-6am at the very best. He'll often wake much earlier but now goes back to sleep on his own. When he was still a baby, the best we managed was when he was doing 7pm-midnight, when he'd wake and cry for hp to half an hour, and then go back to sleep till 5am. People used to ask me how I managed on so little sleep, but to me that was like a dream compared to what had gone before!