How to indirectly reciprocate interest to a guy without ruining things?

A guy I like is also showing interest non-verbally like locking eyes, paying attention to me and asking personal questions. I read somewhere that girls should never make the first move. What should I be doing to express my interest in a non-direct way? I’ve thought about giving a soft smile when next time he gives me those deep eye looks.

Also, do guys pursue directly once they get confirmation of interest in a non-verbal way?

How to indirectly reciprocate interest to a guy without ruining things?
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