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I think you need to break ties with this guy before it gets worse. While I don't often suggest people cut all contact with a partner without explaining anything, I think in this case it would be the best way to go about things for your own good. It's really concerning to me that you said he could rape you and you'd still be with him, so it's super important to leave this situation before you get seriously hurt. I'd block him on your phone, social media, and anywhere else he can get in touch with you. If he goes to the same school, don't hang out with him before or after class, sit with him at lunch, etc.

You are worth SO much more than someone who might hurt you. You have much more value than that. You deserve to be with someone who treats you appropriately and kindly. You're only twelve, you have so much time to find the right person for you.

Is there anyone you can talk to about this relationship who may be able to help you get out of it, such as a teacher, guidance counselor, club advisor, sports coach, etc? It can help to talk to someone who has probably seen this before and can walk you through it.

I hope you are able to get through this okay.

Take care,
Dez