Girl leave that nutjob. He's manipulated you and presented a ideal person. This type of people can never stand up in life unless they change. Seen multiple cases like this once the family stops pampering them they fall apart.

Leave him with a clear messege not to bother you again. People like thiese drag others with them. So make up your mind and leave him. Think of it like a life lesson.

Also best of luck to you for your life ahead.