If you are in therapy and your therapist knows about it, it should be addressed by the therapist. Talk to your therapist directly about your home situation and ask for an intervention. You can also talk to your school counselor or nurse. If there is no response, you can call your state's equivalent of child and family services, but expect to be removed from your home and placed in foster care if you do that. You might not return home. Calling family services is a serious act, similar in effect to accusing your parent of a crime, which will start an investigation, and should be a last resort.
DISCLAIMER: The forgoing comment is for general educational purposes only, and is not legal advice upon which the reader may rely as the commenter has no actual knowledge of the facts of the case, has not interviewed persons or examined evidence, and has not researched the applicable law. The comment is based only on the facts provided, which are extremely limited, and may or may not be true. Complete defenses may prevent the success of any claim. Competent legal advice should always be obtained before taking any legal action or filing suit. Readers employ any information provided herein at their own risk.