It’s a good thing that you talked to your brother and that he was such a good support to you. As for your questions, you already know the answer to question number one which is why you’re writing me. You were scared that he was going to rape you, and that’s why you’re breaking up with him. The answer to your second and third questions are that you should not break up in person unless you have someone like your brother with you. Just tell him you don’t want to see him again and to please not contact you. Make it crystal clear. If you’re afraid he is going to try to contact you after the break up, making your wishes to never see him or hear from him again will prevent that. If he thinks there is any chance you’ll see him again, he’ll try again.