People manipulate me in much the same manner as this woman has manipulated you. You are just being non confrontational and stating things in a non accusatory manner. I doubt you have even confronted many people in life, you seem to blend in like a chameleon. Then someone sees something in you and because of your lack of aggressiveness they turn aggressive on YOU. You were just trying to get through the session witout conflict. I am this way and I always end up getting hurt because I am so non aggressive. People once called the cops on me just because I used a bathroom I wasnt supposed to. If you show you have a lack of aggressiveness then they make up for that lack of aggression in you. As far as not being able to concentrate on school, you need to talk out your feelings in solo therapy, and maybe here too, write about what keeps you from being able to concentrate. Get it all out.