Boyfriend trouble

My boyfriend and me used to have sex almost daily. It was an everyday thing. We loved it! Both of us might be a little bit on the addict side. We have a son now but that didn’t stop us after he arrived we still did once I was cleared for the doctor. Here lately he’s not wanted to at all and we will go months at a time without him even touching me. He doesn’t spend anytime with us. He’s always leaving rooms when we enter. He stays up all night and comes to bed when we are about to get up. He swears up and down he loves us “in his own way” as he says. He also says he misses us when we ain’t around but I’m like you don’t spend time with us when we are here so how can you miss us. I cook, I clean, I watch our son 24/7. I never get a thank you or am I appreciate you. I just don’t know if I should be concerned or if this is a normal thing.