What in the world was he thinking by sharing your letter with his parents? Who else has seen that letter? How bad was the letter? Could this be a tactic. If you sounded crazy in the letter or acted a little crazy during this could that be used against you.. ala, (Gaslighting) "See... she's blowing everything out of proportion...she's very irrational.. borderline dangerous "
I'd have a real problem trusting him after that. I'd have to know his motivation.