How you know a man really love you?

In order to know if someone loves you especially a guy they would be competely genuine with it. If he looks into your eyes. Listen to you but before you can love him back and before you know if he loves you back. You guys have to be bestfriends like as in friends not just someone you met. Love is patient and kind you would know if he really loves you. There would be signs to show if hes caring or not.