Hi thanks for your answer
But he doesn't do it in class !!
When in class, he tries not to make eye contact with me. Sometimes he does but he does it because he's teaching.
What I'm telling here happens when we're not in class.
We have a room when we can stay when it's the break and in front of it, there's the reception and where you can make photocopy etc..
There, he does it... but in class, it's normal.