I am sorry you are in pain as a result of their abuse .
If you do it , they win.
Your actions would be better for all involved ,if you used your voice and spoke up about your situation. Suicide is absolutely final , no do overs , no voice , you become a statistic. A number.
Its not like monks on fire trying to draw attention to Tibet. You would become an american suicide statistic and the bully, they would win.
And they accomplish their goal which is to silence your voice.
Again sorry for your pain, it will pass and you will get stronger, you may not see this now ,though it is true.