What does it means when someone call you once in awhile to ask you how are you

What does it means when someone call you sometimes and pretend like he dialed the wrong number, just to speak to you and listen to your voice

What does it means when someone text you once in awhile just to see how are you doing

it is nice, when you know that someone is there for you, someone is always there when you feel lonely

do appreciate those people <3