My ex boyfriend broke my arms and he said no because I have aspersers syndrome?

Yes. Take the SOB to court. Charge him criminally, and prosecute him. Then sue him civilly for your bills and your pain and suffering. In the meantime, dump him. You do not need anyone like that in your life. Having Asperger's is a problem, but it does not mean that you are crazy. You were crazy for getting involved with him, but now you are no longer crazy, because you are getting rid of him.

Stop answering his texts, report him to the DA as trying to influence a witness in a criminal prosecution, ask the DA what you should do. It is very good that you ended the relationship.

(1) sue him for battery, and (2) get an injunction to keep him from contacting you in any manner, including texting.

Save any texts he has sent you so far, but block him from texting you any more. Report to the district attorney handling the case that he is trying to intimidate you.

Yes. Let the police and prosecutor handle this. Just because he is trying to argue that you are crazy does not mean that it will work. Also, save his texts and show them to the police. He may incriminate himself and make it easier for the police to prosecute him.

Prove that you are not crazy, if necessary. Talk to the attorney prosecuting the case and ask if they need anything from you (such as medical records). If you are only dealing with the criminal case, it is not your job to convict him and you are only a witness. There is a saying in the law that "he who asserts must prove" and I don't know how your ex thinks he is going to prove you are crazy. Did your arm break itself? Get a restraining order so your ex cannot contact you anymore as what he is doing is not only harassment, but witness intimidation which is a crime in and of itself report it.