Keeping 6 month old in his own cot

Hi, my baby didn't sleep well until about 2/3 months old then for a month or two he slept from 11pm till 5am. He's breastfed. He then went backwards in his sleep and now wakes up all through the night. I got really tired and fed him in my bed. Now I really struggle to keep him in his cot. He screams and won't have a dummy and feels around for me. I'm not sure how to settle him back into his own bed and he's spending more and more time in mine 🙉 My partner often sleeps in the spare room now. He just can't seem to settle without me. Any ideas? He has sleep aids, a hedgehog that glows and plays music. It sometimes helps.