Feeling alone even though you're surrounded by people?

Sometimes we, as humans, feel lonely. We feel that way, because we feel left alone, left behind, like no one cares and no one would come and say "hey bro, what's up? Why are you making this face?". But did you ever think that this could be your fault as well? That it is not the others that don't care? Maybe it's only you who acts selfish, who can't take the opportunity to change things. You may want to change things now. You may also want to think things over again. And again. You'll realize that it's not your friend's job to make you happy. That it is your own job to be happy.