Every once in a while we go through this cycle of our youngest missing his BM. He cry's and throws a tantrum at 7 years old. Mom still lets him sleep with her in her bed and BD house we are trying to get him use to sleeping in his own bed as he is a big boy and we want him to gain confidence. I told him "we love your cuddles but you need room to stretch out. You are growing so much, and we need you to start practicing sleeping in your own bed. Someday you will have a place of your own, so start practicing now that way when that day comes you are ready". Listen, I know that is far away from now. I am trying to give him confidence without pushing him away. How can I bould this anxious kid's confidence?  We offer cuddles until he falls asleep and story time. But nothing is going to change if the routine stays the same at moms. Am I fighting a loosing battle? Is there any other way to comfort him without feeding the thoughts of missing her? 
 

he has anxiety in general, he is afraid to be alone. Won't close doors if he is changing or using the restroom. (Keeps them cracked.) a parent has to stand by the door and he has to see your hand or your back to know you are there or else he flat out refuses to change into pjs or into his daily clothes. He shares a room with his brother but it's not enough. He makes his way into his sisters or dads bed. Reciently he started clinging to his sister because she is his closest female to his BM but that isn't fair to her. 
 

any advice would be appreciated. This is my first post so I apologize if it is choppy or long.