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It means he has SOME KIND of interest in you. Either it's a good interest as in he wants you and he's checking you out through social media, or he just knows you're into him and he was trying to scope you our and see what his admirer is like. It typically doesn't mean anything bas though so you should be fine. People typically stalk social media to either investigate, admire, or both
Why shouldn´t he? Is there something wrong with looking at your social media page?
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