Use your DBT skills. Seriously. This is a situation in which you can help yourself to deal with the situation. It doesn't matter right now who is right or wrong. Grad school is inherently stressful, and you may be expecting professors and others to be more than they really are.... you will be disappointed, you will feel injustice, and you will have some nice times too....
& Remember that Marsha Linehan had BPD herself.