I promise, they will grow out of it
I've read so many posts on here from, frankly, knackered mums and I see myself in all of them
My 2 children are about 3 years apart and I've had years and years of both of them in with me (and dh in their beds), having to lie beside them at night to get them off to sleep or to sit and hold a hand while they drop off, trying and failing at controlled crying as I was in tears too and I hated it, trying every night light known to B&Q, story tapes, dreamcatchers, endless picture books, cuddly toys, blankies, you name it, I've tried it to see if it would help my non sleeping kids get a sleep.
But do you know, the only thing I found to actually work is TIME. I hate to say it out loud so I'll write it here, but I think after 11 years of broken, miserable sleep, my kids have finally started sleeping by themselves, all night. They still wake early, but so what!
So if you are totally at the end of your tether and have given up, please read this and think
IT WILL GET BETTER
(honest!)