There is seriously nothing you can think about, but him. You know you shouldn’t be thinking about him, but you are. You’re always thinking, “What is he doing?” “What is he thinking?” “Where can he be?” “Is he thinking about me?” “Why isn’t he texting me back?” Girl, calm down for a sec. This is the number one definite sign that you have fallen for him. Even if you tried to not think about him, he will find his way back into your head. You’re going to find a reason to think about him. Whether it be a song or even someone with the same name as him.