Try to give them as much attention in one week till they get tired of you. Second week give them less attention than you previously did. The third week give them zero attention at all and make it seem like you gave up on them. This will make the person feel obnoxious and they will think that they lost you and I promise that they will try to contact you. I have done this on girls that I have liked but they had no interest in me. 100% certified
(I did not invent this but I'm a professional at it) (Works for both genders)
(I did not invent this but I'm a professional at it) (Works for both genders)