Kobayashi said: I am Kobayashi. After entering junior high school, everyone said that I had changed. At home, I don't want to tell my parents anything, and I often shut myself in the house.

(1) Kobayashi is normal (it is a manifestation of adolescent psychological atresia or psychological contradiction or negative emotions).

Reasons: ① Because of the enhancement of teenagers' sense of independence; ② Due to the development of teenagers' self-awareness.

The locked psychology, if not handled properly, will have a negative impact on physical and mental health, resulting in different degrees of psychological loneliness, which will form a defective personality if left unchecked.

(2) Overcome your troubles and accept yourself (to yourself):

We should realize that each of us is a unique individual. Only by truly knowing yourself can we overcome our inferiority complex, accept ourselves happily and develop ourselves better. ② We should know ourselves correctly, overcome our shortcomings and improve our self-control.

Open your heart (to others) and learn to communicate;

Such as: ① actively communicate with classmates; Trust parents and teachers;

2 if you have problems that you can't figure out, you should boldly tell others and don't let some problems bother you for a long time;

③ Take part in group entertainment activities to relax;

You can also keep a diary to talk and vent.