Anyone participate in partial hospitalization DBT & go to school (graduate school) at the same time?

My therapist told me not to go to school while doing DBT program (8:30-3:00 m-f) but my program chair said she thinks I can handle both, that being busy would be best for me and help prevent a spin out resulting from terminating with my therapist, that I can control it, I don't have to spin out.

I'm not sure what to do...

School would be two days a week, one day/one class from 6-10, the second day two classes, two hours each, still 6-10.

Program chair also thinks I'm "getting attached" to her. I told her I wasn't going to get a new therapist that I just wouldn't attach to anyone, and she laughed and gestured with her hand and said "what do you think you're doing here?" You're getting attached to me...so you won't get attached to a therapist, you'll just get attached to your program chair?