From a psychological point of view, it is really a self-defense mechanism, because the damage caused by lovelorn is hard to dissipate in your heart. Although time will slowly wash away that kind of injury, when you come into contact with people, that kind of injury will happen subconsciously. I suggest you contact more people and gradually dilute this self-defense mechanism. Then in daily life, there will always be people you like, or people who like you, who dare to express themselves and know how to cherish them, hehe.