Sounds like you are on track and working through the process.

His only concern for me is that I might set up too many boundaries, that I shut everybody out.
When I finally started dating again, my boundaries were more like barbed-wire fortress. Not bad, but definitely did go a bit the other extreme when I first started thinking of being vulnerable again. I called my T, did a check in and let go a bit, it is all a journey.
Peace,
SB