High five and interlocking fingers?

What does it mean when a guy high fives you and then interlockes his fingers with yours?

It happened to me and the guy is my crush, so I was wondering what it means.
He high fives me and interlocked his fingers with mine so I did the same and we stayed like that for a few seconds?

Is this considered as flirting or is just a friendly gesture?
High five and interlocking fingers?
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