Taking the right steps in protecting yourself is important. No spell is going to accomplish what you can do with your will and determination. You have decided this relationship is toxic and abusive. You have sought out help from Law Enforcement and they told you they can do nothing to help you. I do not know where you reside so I can't give you specific resources, however most law enforcement agencies have a list of community support providers that can help you. Call them and ask for this resource. If they don't then contact your local resource center (this can be found on line usually with a quick google search). There are dozens of support groups that work with domestic abuse situations. (This is both physical and verbal)
These groups can help remove you from the house, provide a place for you to stay while transitioning out of that environment, go with you to get your things and such. The most dangerous time is 24-48 hours after leaving the house. You will want to have supports around you. If he remains that is his prerogative and you should look for a place of your own. If he is unable to afford rent he will leave. If you return to this home, you will need to change the locks or contact the Land Lord to explain the situation and have them change the locks. You will also need, and this is the most important piece, block or change your phone number. The problem in most of these situations is the victim often feels guilt and a sense of needing to support the other party. You must cut off the access to you completely so they can no longer manipulate you.
Once you are in a safe space, then and only then should you start researching and learning about protection spells and banishing spells. To try and grasp the concept of magic while you are still in this volatile situation isn't going to be fruitful. If you are not willing to separate yourself from this, than start documenting every abusive action. If it means going to the police and reporting it every time, than so be it. They may tell you there is nothing they can do (if they haven't broken the law) but you are establishing documentation to everything they have done. Eventually, there will be enough on record and it will help you in the long run.
I highly disagree; committing a literal crime and making it look like someone else did the act in stead is extremely unethical. It is simply a lie at the cost of another person's life, basically. Actual evidence, truth, fact: Those are the only right road in my opinion.
Practically, there is a pretty high chance this could backfire on them as well, so framing is probably not the best idea.
I don't have much to add on top of the previous comments. You probably would do better with protection spells while you are still stuck there then other shielding/banishing spells once you are actually away. However, trying to do solid energy work in such a stressful situation may detract from the strength of your spells.
Unfortunately, I don't think there is any way magic can be the main way your problem gets solved, but there are some ways it can help defend and support you along the way as you make these difficult choices.
Thinking of you, please be safe. Hope you get into a better situation soon!
