Talk to him too about the fear of rejection. I think both issues are important for us to understand and resolve about our T and that they have far-reaching effects in our lives/thinking.
When my T said twice "I'm not going anywhere." and expanded on that a bit, I felt so relieved! I'm glad I said it to her.
Let me know how it goes if you decide to talk about it with him. It might just open up a whole new avenue to travel with him...