He told me he will get me pregnant?

Out of nowhere, he asked me when I was going to have his baby.
From my understanding, we are not official.
He[20] is in the military.
I haven't met anyone he knows.
He told me how he always wanted to have a kid and his other attempts at having children.
I told him, I would prefer to get married, or at least be in a committed relationship before having a child, lol.
He told me that marriage doesn't mean anything.

I don't understand where this is coming from.
We have never spoken about anything related to children before.
Any advice?
He told me he will get me pregnant?
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