Husband refuses to sell out house.. advice?!

** update** I have done it all. This has been going on for four years. Our current house is paid for. We paid it off pretty quickly. I’ve approached the situation every way. The money isn’t the issue. We were previously pre approved for $750k. I’ve sent properties to him, I’ve tried the lets rent thing. Let’s build on. Trust me when I say, I have tried it all.

When we got married, we didn’t want any children. We bought a house that was two bedroom/two bath. Well 10 years later, here we are with three wonderful kids. Lol.

I’m a stay at home mom and he is out financial provider. As you can imagine, our once big enough house has become quite small. I have brought selling it up to him multiple times. He would always say, let’s pray about and think on it. This has been the conversation for many years. Well the other day, he tells me no. He said he isn’t moving. It’s across from his parents and he’s familiar with the area and just doesn’t want to. This is definitely disappointing. I have maximized every corner in this house, decluttered and done all I can to make this a comfortable home. Although we could afford it, I’m not asking for a huge or even fancy house. I’d be fine with a three bedroom/two bath and the two boys sharing a room. He says I should just be grateful for what I have because some people are homeless. I am, I’m so grateful for our home. Should I just suck it up and find a way to be content and just be grateful or keep pushing the subject and hope he changes his mind? He won’t build on either. I’m just stressed. Thanks for any advice