How far is this going to go before you leave? He’s holding you hostage and he’s going to keep escalating.

You need to tell the police and someone who cares about you. I know you find it embarrassing, but he’s the one who should be embarrassed, not you.

You are in danger. You need to get out, block him and his friends on everything, change your email and phone number, maybe stay off social media for a while, and go stay with someone you trust.

As an aside, revenge porn is illegal. But if you are really concerned, you can set a google alert to email you when anything with your name is posted. A friend had a nonconsensual video of him taken and posted, and we luckily were able to get the video removed within a few hours.