Sunshine, I'm sure your T has a reason to share anything of his personal life with you, but for the very reason of what happened(you began to worry about opening up to him, fear of closeness and then losing him, spending time worrying about him, etc) is why it really isn't a good therapy move imo.

But it does sound like he is caring very much about you, and I would go ahead and share whatever you can with him... I mean, you have no other anyway, and he sounds like he can help you get through this tough time. (((hugs)))