At some point in his exile Booker finally hits rock bottom. Instead of taking out his pickaxe to dig himself deeper, he tries to get himself out of it and move on from his grief.

(I feel like he could forge some documents and some papers to create a fake identity based off himself but more "modern" to keep suspicion off of himself until he tell his therapist the truth)

+ He also keeps this a secret from the team (if they're in this story) because he doesn't know how'd they react to him telling a doctor of their secret after everything that has happened.