What are some telltale signs a man is romantically interested in you or even has a crush on you (small behaviorisms, etc.)?

For example: Lifting you up frequently, picking fluff out your hair, anything ALL guys do if they are romantically interested in a woman, that can tell you straight away he has a romantic interest, rather than a friendshippy one?

What are some telltale signs a man is romantically interested in you or even has a crush on you (small behaviorisms, etc.)?
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