I agree with Bellax3. Let it roll by. You don't have to be friends.
You're not required to be friends. You're there to do the best you can in class. I know it hurts to be attacked. I was in a meeting with a grown man who made a demeaning remark to me. I was just flattened. Another man at the table defended me but I couldn't get over the rude comment. I worried over it for days afterwards. I hope you can overcome the situation and not let it get you down.