What happen to my classmate

One of my classmates who is my buddy did come today and he left earlier yesterday without saying anything to me and even the teacher.

I tried to collect the handout for him yesterday afternoon but the teacher did  not let me.(He probably did not happy for his student who just left but said nothing-even an excuse)

It is unusual for me,I will say.It does not like the man I knew.
We even have a plan to meet each other this Saturday and today is Friday.

Anyhow,I will find out through email to him.