Hello koko! I'm sorry to hear that you're feeling so badly and I really hope that you can receive help soon.
From my own experience I have been with a guy for three years and I've had mental illness throughout all of it. When we were first together I know that it was a struggle for him and he would often get frustrated and be unable to give me the support I needed. Over time when we learned to communicate better things became amazing and he absolutely supportive of who I am. I think that communication is a big part of this. Your boyfriend may be scared and having trouble dealing with this as well. If you feel that he is blaming you for the way you are feeling then you should tell him this.
Maybe he doesn't realize that he's not being supportive and thinks that what he's doing is the right thing. All I can tell you is that actually sitting down and telling him what you need can be really scary, but it can make things so much better in the long run.
I hope that things get better for you, dear.