i could feel your pain when reading what you wrote - i so admire your bravery to ask in the first place AND even in session, to be able to tell him it was REALLY important that of all days, he hadn't forgotten to read or bring it. That took guts to share that much. I don't think i could have said as much, and i know i would have stuffed down all feelings until i was well out of there, and my T would have had ZERO idea how devastated i was - so i also think your'e very brave for allowing your true emotions to come through in his presence also.
I like what the others said, about it not needing to be the same thing and same story in terms of you 'newer giving second chances'. there is an old recovery saying that goes "if you always do what you've always done, you will always get what you've always got"
(im NOT saying you aren't changing and haven't by the way… i quote that saying purely because i use it to motivate me to take risks and try something different / again)
your T wont allow txting - how about email? when you see him next, can you ask about emailing? that way IF you post a letter and he forgets it again, if its in an email, he can prob access it from is office?