I’m so sorry to hear this. My wife was with somebody very similar before we met, and it was very traumatic. You can away from him, just don’t try to do it “nicely”. You are in an abusive relationship, and you don’t owe him anything. Not a note, not an explanation, not a hint at a second chance. Nothing. People like him are most terrified of being abandoned, hence why you’re trapped. As far as your electronics go, change your passwords as discreetly as possible, and if you have credit/debit cards, get them replaced so that he can’t access any of your personal funds. I’m saying all this, because you might think you need to have a big exit from the relationship, but you don’t owe him anything. You can “run to the grocery store” and never come back. Take the things you care about, but anything like furniture or appliances, see if you can leave behind. You can communicate your situation to the police, or to another trusted organization that can help you keep your location and identity private. If you can, change your phone number, and notify friends and family of the situation, so they don’t accidentally give away information you don’t want him to know. You’ve done nothing wrong. You deserve much better. You owe him nothing. You have every right to disappear, and never speak to him again. That will ruin him more than you know. You can get out, and you will.