Answer:

Three reasons, for reference only.

1, after entering the university, the average age has reached 18, and the ideological and psychological needs will increase.

I think more than junior high school and senior high school. Growth needs a process.

2, everyone comes from different families, and because of different growth environments, people with different personalities have been created.

Some people are introverted, while others are extroverted. Some people are very skeptical. Some people are good-natured, easy-going and easy to get along with.

If some people are thoughtful, unsociable or selfish, it is difficult to be good friends with them.

Finally, I hope everyone can find real friends on the road of growth.

Remarks:

Friend is a China word, which means that under any conditions, both sides' cognition is related to a certain extent, regardless of age, gender, region, race, social role and religious belief, which conforms to both sides' psychological cognition and can help each other when necessary. Friends can be compared to umbrellas and lights in the rain. When the psychological fit between the two sides is more profound, they can be called bosom friends.