They make frequent eye contact with you
They smile a lot when they see you
They find reasons to talk to you
They reply quickly and keep conversations going
They remember small details about you
They ask personal questions about your life
They seem nervous or shy around you
They laugh at your jokes
They mirror your body language
They lean in when talking to you
They make time to be around you
They initiate contact first
They compliment you often
They tease you playfully
They seem interested in your relationship status
They notice changes in your appearance or mood
They go out of their way to help you
They touch you lightly and appropriately
They get jealous when you mention other people
They include you in future plans
They act differently with you than with others