So one of my best friends thinks that I'm using her. In some lessons I've moved away from her to help me concentrate a little and because of anxiety issues. It tends to be a different friend I sit by and she wasn't in yesterday so i sat with my friend again just for the day ( most of the class went on a trip) and because of this she thinks I'm using her. It breaks my heart so much that she thinks this because she is someone that I'm so close to. What should I do?