You said that after further contact with your classmates, you felt that your outlook on life was very different from his. In fact, sometimes it may not be that your outlook on life is different. Many times, it's just that your tempers are different or your values are different. It's just that people nowadays always feel that as long as they don't get along, their outlook on life will be different.
It is well known that we need friends and acquaintances. After all, it is easy to make friends with more friends, no matter where they are. If you refuse a friend just because the other person doesn't agree with your three views, there will be another friend around you in the future. When you get to know each other better, you will find that the three views don't agree, and then you will refuse to be friends with each other. Then I believe that there will be no acquaintances around me, let alone friends.
A really smart person is one who can talk and laugh with each other, but has something to say in his heart, even if he has different views and temper. As long as the other party doesn't go too far and beyond your own heart, then you can smile at everything. When the other party infringes on your own interests, it's not too late to stay away.
In my opinion, make more friends, even if the three views disagree, as long as they are friends. After all, no one knows whether they will use each other one day.