I don't know what to do anymore... I'm so lost..

I've been with my guy for 2 years now. We have a 5 month old baby together. Recently he inherited his grandfather's camper and land so he's been staying there and I've been staying in my own home. (Long story) The past few weeks he's been distant towards me. And here lately it's getting worse and I can feel it like a ton of bricks. Today I didn't hear from him till 5:30 when I decided to video chat him. He was with his buddy. We talked for literally 4 minutes and he said he was getting off the phone. From 5:30 till midnight I waited for him to call. Or to even message me and nothing. So I reached out to him and this was our conversation..

Me: Remember me? Lol

Him:yes

Me:I'm just making sure. I waited all day to talk to you for a bit and haven't heard anything from you.

Him:I just haven't wanted to talk to anyone.

Me:ohh okay. fair enough.

3 hours go by with no response..

Me:I know you haven't wanted to talk to anyone but I really miss you and wanted to hear from you before I lay down. Do you still not want to talk?

Him: bedtime

Me:alright

No response after that.

Am I overreacting for feeling so sad and really wanting to talk to him?

He doesn't care to talk to me or anyone he says but he has his buddy over his house helping him clean up the camper. I just know tomorrow he will more than likely reach out and pretend nothing happened or not considering my feelings. What do I do? I've tried explaining how I feel with him but he always makes me feel like I am the one being ridiculous about it. Honestly I just wish I could detach myself from him and let go. My heart wants to hold on so bad but I'm so drained from everything. I just don't know how to Walk away. I don't want to walk away but I'm sure eventually I will have to....... My heart hurts and nothing is the same.