I think you made the point earlier about wanting to know early on if he wasn't able to give you the kind of therapy you need. If that is the case, you would want to know now rather than later (although obviously earlier would have been best!). You need what you need. You shouldn't feel like your feelings and needs are an inconvenience to your therapist, no matter what you're bringing to the table and how big or small it is. If it turns out that he isn't the right therapist for you, you now have the experience of getting a good start with the attachment stuff with two different therapists and that makes me pretty confident that you could do it with a third.

That said, I think it's likely that whatever your T has to say, he just didn't know if he could adequately convey the nuance over email. I'm glad you're going to see him to talk this out. A big part of therapy is navigating tricky situations together, so hopefully he can come through for you. If not, you have the power to decide how to proceed.