I tend to also lean too heavily on my significant others. It is a lot of weight and pressure for them. In your situation I imagine it is very difficult for your bf to manage his own stress related to school and his feelings about you harming yourself.

He cares for you. He is not abandoning you. He is trying to remain focused on his education because his future is rooted in how well he does in school now.

I am sure seeing you hurting yourself is not easy for him and there is no script on what a person should or should not do when they are in a relationship with someone who is struggling emotionally.

Now is a great time to focus on you and discovering all of your interests, limitations, aspirations, goals, and hurdles. Use the help of friends and a therapist and really get in touch with what makes your life better.

Then and only then can you offer him a whole and healthy partner and in turn you will get one as well (even if you the break up sticks).

Become the best version of you that you can!