Struggling to be supportive

I feel like my partner is constantly starting and stopping big commitments (university, projects, etc) and sometimes we end up moving because of it. I feel like I am getting dragged along for a ride sometimes. I know some of it is because he has anxiety too. When he brings it up, it triggers my anxiety too. I feel like I can't be supportive. I am trying really hard to be. But when he talks about how stressed he is and how he wants to quit school, it makes me feel like nothing in our life will ever be stable. I struggling so much with my own life, I don't know how to be supportive at the same time.