Most Helpful Guy
More than likely it will get worse, and no-one should endure the suffering you are currently accepting. It is what is called a toxic relationship, and you need to leave as soon as possible. Consider taking out an injunction to stop him contacting you, too. And be careful.
Most Helpful Girl
He's being aggressive already. Prevent him from abusing you by standing up for yourself and ending things before they get ugly. If he says you're the cause of his behavior, then you need to stay away from him.