I think you should listen to his parents. This behaviour is really unacceptable, and he could escalate this and seriously hurt you. Collect your belongings from the house when he's at work, and make your exit. There are some behaviours that are just absolutely unforgiveable, and this is one of them.
The tangent you guys are having is only 5% of OP's point. I just came here to say that 🙂
I think you should listen to his parents. This behaviour is really unacceptable, and he could escalate this and seriously hurt you. Collect your belongings from the house when he's at work, and make your exit. There are some behaviours that are just absolutely unforgiveable, and this is one of them.