Tyler Joseph, the creator of this song, is talking in his point of view. He's talking to his fans. I believe this because in numerous interviews he has called his fans friends, and has told them to stay alive. "Friend, please don't take your life away from me." Is referring to his suicidal fans, who he helps. He wants this song to be for whenever someone is feeling down. He wants us to stay alive, for him, for Josh, for the band, for everyone.