Why dose he say ‘Good night and sweet dreams every day?’?

I met this guy online three months ago. But the last two months I worked in a different country, so I could just finally met him in person last week. Before we met, thorough the last two months, he almost texted me ‘Have a nice weekend’ every Friday night. But, we did not have much conversation. I said something to him but he didn’t reply. After last time we met in person, he texts me ‘ Good night and sweet dreams’ every night. But we do not talk about anything. I ask him about work or life. He gives short reply. And he usually doesn’t reply my texts immediately. Anyone can analysis his behaviour here?
Updates:
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The weekend is coming. He hasn’t asked my plan or planned to do anything with me. Won’t a guy ask a girl out if he is sweet on her?
Why dose he say ‘Good night and sweet dreams every day?’?
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