I repeatedly got triggered by him and now I am numb toward him. This is normal? I don’t think so.
Sounds you are blaming him for your own reactions, and your own disorder normal.
Which really is not normal, the blame. The reactions, quite are.
And that people would trigger others is also normal interaction stuff. Not just a relationship. Interaction as a whole. Others will say what we do not agree with, do not like, do not appreciate, or are triggered by. That happens.
Some of my old reactions regarding dissent are fairly extreme. Does it mean anyone disagreeing with me SHOULD get shot? A hellno. Because it is not applicable, because situations are different, because the audience is, because life rolls different. Me being stuck in any of the old reacting? Is up to me to change, and solely me.
Expecting others to react positively to your every whim, and to NEVER trigger you and say wrong etc, and to right every of those missteps is a wee tad controling. And not a responsibility of other people. Yours, or ours, as sufferers.