Husband said he's not that excited yet?

We were out shopping at baby's r us, just for some essentials. I am 17w pregnant with our first child. I am so excited about this baby, and while we were shopping I asked him why he isn't excited and he says "because we still have so long to go. I'll get excited when it's closer to the due date". 
I just felt upset. It's our first baby. We were trying actively for 1 year to make this happen. Why wouldn't he be excited? 
Anyone else SO like this?

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