"You, go stand up in the hallway." He ordered your male friends, who was peacefully having a conversation with you.

"You, answer the question on the whiteboard. If you don't know the answer, go stand up in the hallway." He ordered the male classmate that was trying to start a conversation with you now.

His face are stoic but you can feel his eyes locked on your direction while continuing his lectures. It seems like he's getting jealous every time he saw boys having interaction with you.