Boyfriend (22m) read my diary (21f) and is upset by what I wrote about my ex (21m) and demands that I tear out that part. Am I being unreasonable in not wanting to comply?

Sucks that this is how I’m spending Valentine’s Day. I had a gift I made for him, I feel so strongly for him and am hoping to salvage this, but I’m also extremely hurt and frustrated by his actions and idk what I should do.
My bf read my diary while I was staying the night at his place after I had fallen asleep. When I woke up, I could tell something was off - he wasn’t being affectionate at all and seemed bothered. He admitted to reading my diary and I was shocked and furious. I asked him how much he read, and he said at least 20 pages. He read the pages about my ex that I had written BACK WHEN I WAS WITH said ex, not in the present - he’s not at all on my mind anymore.
My bf said he was extremely hurt because I had described how attracted I was to my ex, wrote in so much detail about intimate moments, whereas he I didn’t write much at all about my current bf. I explained to him that I had SO much to say about him that I didn’t even want to take all the time to write it, when it could be time spent with him. It sounds like an excuse, but it’s true. Unlike my ex, I can really talk to my bf about how I’m feeling and who I am - I don’t need to turn to my diary. None of that made any difference to him.
I asked why he did it, he said because he thought I might still have feelings for my ex since we broke up not too long ago and I got together with my bf shortly after. I said that’s not true at all, and I wish he had come to me with his concerns instead of reading my diary behind my back. I told him I was very upset, but could overlook it this ONCE if he promised never to betray my trust again. Here’s the ****ing kicker.
He said if I didn’t destroy those pages about my ex, we are over, as he feels that they disrespect him. I love this idiot, but HE disrespected ME by reading my diary, does he have any ****ing right to ask me for a favor now? We cannot agree on this and our fight got really intense, we are not speaking at the moment and need to clear our heads.
I don’t want to destroy the pages because a) it’s an account of my life and I don’t harbor feelings for my ex but that WAS a part of my life and it tells my story and b) he might think I’m always willing to bend to his will, and take advantage of this in the future. He’s the one who ****ed up and needs to make amends. Am I in the wrong at all in thinking this?
This situation SUCKS, but I do love him and want to make it work. Is there any way I can do this?
tldr; bf read my diary about my ex behind my back and feels disrespected, demands I destroy the pages or our relationship is over. I want to make it work, but I think he’s in the wrong here. He won’t budge.


Source.