My son had this problem for a long time. He slept on the couch and refused to sleep in his bed.
I found Phobia Release and bought it. He did not want to try it but I insisted. He had to overcome this before I lost my mind.
Overcoming his fear of a bed was great news for the entire family. Clinophobia- fear of going to bed is not something to take lightly as he did. I am happy to see him in his bed where he belongs, now when he sleeps late, it does not affect the entire family.