Help? what do lingering hand holds mean?

Cutting straight to the chase, I’m in drama class with this guy so contact us pretty common but whenever we have to hold hands, whether it’s him helping me up, part of the act or just him being flirty, when it’s time to let go he kind of lingers against my fingers for a moment and holds the tips of my fingers before finally letting go? Among other things like hugging and being more touchy and flirty with me than any of the other girls what does the lingering hand hold mean? Is it significant?
Help? what do lingering hand holds mean?
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