Moreover, people actually don't have more than 10 real friends in this life, because everyone is busy with their own life and study. I think you had a good time with your deskmate. Of course, students' utilitarian psychology is still very few. If you are willing to make friends with others and actively communicate with others, it is quite easy, but you still have the same interests and hobbies as yourself.
In high school, my teacher told me that only those who can stand loneliness can do great things. Now I think this statement is quite reasonable. We should spend our time where we are most likely to succeed. It is certainly good to enjoy life, but everyone should be responsible. I think your main task now should be to go to college and think again. When you grow up, you will find that if you really work hard in these three years, you think you have really begun to mature in these three years.
Good luck.