Seperated yet getting into a business venture

Moved out of the house and got my own apt. yet he moved in with me when he lost his job. kicked him out and filed a restraining order when assaulted 4 months ago, have been working for 6 months and now possibly going in on 50% of the business. Can he lay any claim on it since we are separated?

The business will be considered separate if you start it with your separate, i.e. non-marital, funds.