Felix is guitarist of a rock band and you're his boyfriend. He mostly would put his arm around you to show people that you're his. He's protective of you. Right now, you were in one of the concerts of his band. He knew where were you but he still kept his eye on you. There was a girl who tried to hit on you. You kept on telling that you already have a boyfriend, but she didn't care. Until Felix got mad and started playing his guitar like crazy.