What does it mean when your guy friend ignorgs you for no reason?

he's probably just upset about something. did you two get into a little fight? did he and his gf break up? family problems? talk to him about it. if he's really your friend he should know your there to listen. if not, then give him some time. he's probably just upset about something and needs a little space. all people do. so if he isn't so keen on talking, give him some time and approach him again.