Be the bigger person with a guy
So a guy you like paid attention to you all the time. Then he starts acting cold. One time not even a hug good bye. Your friends tell you to ignore him and make him come around but deep down you want him to pay attention to you again. What do you do?
Be the bigger person. There is nothing wrong with saying "Hi," or "Bye." Maybe tone it down with a friendly hug. If you knew him over a year then there is no reason why you should just act like it was nothing.
Maybe he had a bad day. You don't know. Be nice to him and focus on another guy. You don't know what will happen in the future. Maybe one day he will come around. Be the bigger person and show him that he is not getting to you.