Why does he seem more interested in me in real life than he is through texts?

I recently started a serious relationship with a guy that I have been dating for a couple of months. When we text he usually answers after an hour or two and most of it are short answers but not cold. When we see eachother he always seems more interested in me ( we see eachother once a week or once in two weeks). What does this mean? Is he not enough interested in me?
Why does he seem more interested in me in real life than he is through texts?
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