Well, he's had time to read and analyze and think about your poems, where they came from, what they mean. He had time to decide how to approach talking about it, knowing you and knowing how OMG! you must be feeling about him reading your deepest thoughts.
He is probably in awe of your courage to let him read it.
I can imagine you are nervous. But not so nervous you'd want to skip right over what I imagine will be a stimulating, interesting, intimate discussion. I can imagine this taking several sessions, maybe one poem per session or one theme per session... I think once you get going it's going to be enlightening and exciting!
I really like how he said "Come on... just take a chance..." to you, and that you could respond.
And I love that he said "It's never enough" about going deeper and deeper into things. That would be reassuring to me, that there is always more there, always more to talk about.
I have to tell you, if it were me, I know I'd be having all kinds of thoughts about what he could say... ("Well, now, this explains EVERYTHING!"). I'd be preparing my defenses and would probably be near hyper-ventilation as I walked into the room!!
I understand your worries but I think you have a really solid T who can take anything, and he likes you and is genuinely interested in you. But at a time when you've revealed a heap of intimate thoughts, you need to feel he's there more than ever, so I think that's stimulating your abandonment fear. What do you think?
I don't envy you, walking in to this next session feeling uncertain and afraid. I hope you embrace your eagerness and excitement too!