What did he mean when he said" I was just thinking about you! ?

My guy friend and I have been texting everyday since last September. And he is always the one who texts me first. But for a change, I texted him last night and asked him how he's doing. He replied"I was just thinking about you! ". He has also asked me what i think of him when he was drunk texted me a few months ago. Does it mean something? Or am I over thinking?
What did he mean when he said" I was just thinking about you! ?
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