I wish you could drop the course. Ideally, you should get some needed treatment before you will be ready to deal with something like this on a daily basis. Is there any way you can put off taking this particular class until another year?
If not — here are some suggestions:
- Change your seat if you can. Sit with your back to the wall and near a door. You will feel safer.
- Practice breathing techniques to calm yourself. Tell yourself “Then was then, now is now. I’m safe in class.”
- Find a friend in class and sit next to him or her.
- Focus on taking very detailed notes. There is no need to make eye-contact with the prof.
- Count down the weeks. You will not be in this class forever. Remind yourself when the class will be over.
If all that doesn’t work, you might want to try to talk with the prof. You don’t owe him any explanations. You can simply state that you would prefer that he not hover near you. If he presses for information, thank him for his concern, reassure him that it has nothing to do with him and restate that you prefer not to go into it. Then say a polite thank you and leave.
You said you have never had treatment for the abuse. I imagine there is a counseling service in your school. Please take advantage of it. Recovering from 10 years of abuse is generally not something a person can do on their own. You deserve the support and guidance of an experienced counselor.
I wish you well.