Does he secretly love me?

I been talking and going on dates with a guy for a month and a half. We have gotten pretty close and he has been always hinting at the idea of me being his girlfriend. Recently when we were on the phone saying good night he said said “good night sweet dreams I love you.”then he toke it back and said it was an accident and got nervous and hung up. He never gets nervous ever. Also I know its not an common thing for a guy to say so I'm wondering if it wasn't a mistake.

Does he secretly love me?
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