My boyfriend found my journal about him from 9 years ago?

When I was 17 I met my boyfriend (K). He worked at a grocery store near me and I thought he was so cute. My friend (P) and I would go into the store and I’d take note of days and times he was there. I had P talk to him and he told her to tell me to text him. So we talked for a few days but then he ghosted me. That made me go crazy. I applied at the store he worked at but in different departments so we rarely saw each other. I honestly got kinda creepy with it, found out where he lived and would drive by, got more obsessive with my journal, built relationships with his friends to get closer to him, P even helped me spread rumors about the girls I thought he was involved with. I wrote all of this in my journal back then. I never thought I was doing anything wrong cause I wasn’t trying to force contact or anything. We didn’t speak, I found out where he lived on accident, etc so I justified it even though I learned it was pretty creepy. I got with my ex husband after about 2 years and basically forgot about K.
K and I got back in touch 7 months ago and he told me he was sorry about ghosting me back then, but that P had told him all this stalkerish stuff I was doing and he said he believed her but “now sees she was lying about me”. I played it off like it was true, that I didn’t do any of it and P was jealous.
Last week my mom gave me a box of stuff from my old room. I set the box in my living room to go through, but K came over and I didn’t have time. I went and showered and when I came out, K had found the journal in the box and was reading it with a confused look on his face. He confronted me, asking if this was all true or a prank and I said it was true. I told him I was a kid back then and liked him a lot but that was then. He’s not that mad about the creepy stuff, but mad that I lied and thinks I manipulated him even though he’s the one that approached me this time. He does feel a little uncomfortable and I don’t blame him. Says he needs space. Can I fix this?
Updates
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Found out he also got in touch with P and is asking if there’s anything he doesn’t know, as if I didn’t write it all out in my journal. I’m mad that he’d messaging her because our friendship ended very badly with her coming onto my ex and I’m worried she’s going to seduce him. I don’t think he’ll fall for it but I wanna try and fix this before she has that chance.
My boyfriend found my journal about him from 9 years ago?
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