How do you explain to your husband that your things have sentimental value and you don't want to get rid of them?

My husband has a boat and an entire garage full of tools. He has a giant 10foot square shed storing his outdoor things for fishing, hiking, canoeing, hunting, gardening, and tools. He has an office filled with gaming paraphernalia and other stuff. He has a home gym filled with workout stuff.

I don't have a space that's "mine" in our house because my office space got turned into a child's room and my hobby room was turned into a playroom. I gave up all my hobbies (Cricut, knitting, sewing, quilting, and scrapbooking) to make room for a playroom. My husband wouldn't give up any of his space so it was all on me. I used to make beautiful scrapbooks but he decided since we could do everything online, that's the way to go.

All I have left is a tiny closet that holds my baby box and two totes of my childhood toys and memories. He wants me to get rid of these things and I said no, these things have meaning to me.

I've gotten rid of so much stuff to make room for his things and our children, and he refuses to give up any of his spaces. He's even snuck some stuff out without me knowing. I felt awful but I was gutted when I couldn't find my box of school memories and all my yearly planners, and he said "Oh I didn't realize you wanted that. I threw it away."

I've tried reasoning with him but he doesn't understand. He lost all of his possessions in a fire when he was in highschool. Any time I tell him I don't want to part with things he brings up the fire and how "You don't see my crying about how I don't have a baby box".

I asked why he needs this little basement closet anyway and he wants to use it to store our kids toys. I told him we have an entire playroom with a giant closet. Maybe it's time to go through their toys. They're 4 and 6 and honestly, there's so much junk in there that's broken that we really should do a cleanup. He said I'm being selfish by holding on to stuff that "has no value".

I reminded him of all the stuff he has and how I have sacrificed a lot already and he told me I was being selfish. He told me I was setting a bad example for our kids.

I don't know what to do. This is the only sticking point we ever fight on. I would be devastated to lose my baby box and my final two totes. It's all I have left and I don't know what to do. I feel like if I get rid of it, I'm no longer me. He tells me "that's hoarder mentality". I asked him why he can't make room in one of his spaces and he said "I don't want the kids stuff in there". I asked him why he can't get rid of some of his stuff and he said "I use everything. When was the last time you used your baby blanket?"

I feel selfish for not wanting to get rid of my things but I have horrible anxiety over getting rid of them too. I told him I would rent a storage space and he told me that was ridiculous and a waste of money. I don't know what to do. I don't know where to start.