He/she's fake or she's either hiding something from you.
Also, talk to him/her in person and not by text or social media. Y'all will get things done and talk. The rule applies to people who want to terminate relationships. Don't break up via text or social media (i.e Twitter, Instagram, Snapchat, Facebook) because it will make you feel like your scared of that person. Confront the person face 2 face.