How do you put your toddler to sleep? My almost 3 year old has to have my hubby sleep with him or…

How do you put your toddler to sleep? My almost 3 year old has to have my hubby sleep with him or he'll wake up crying bloody murder ! As soon as my hubby gets up to leave the room my son wakes up crying like a maniac! I want to get to the point where I can tell him " it's time for bed go to sleep" and I read him a story and he's good..😩