All of this sounds very reassuring because his response, per your description, was spontaneous rather than rehearsed. All of what he is saying sounds pretty authentic. I hope this helps. Maybe take this post (above) and send it to yourself but not verbatim (just in case if he accidentally finds the email, I would not want him to place a verbatim quotation into a search box and discover your presence on this forum, because it is your private business). Rephrase it and send to yourself and archive it in our email. Or put in a file that he would not see. And, when you feel the doubts coming back, look at what you YOURSELF wrote. It would be more convincing than if a 3rd party tried to reassure you.