Please get out now. I'm not sure why so many people make posts about how they can change their partners bad behavior. In short, you can't. Get out now, as he has been abusive since the beginning. Read up on the red flags of relationships. One of them is the isolation of you from your friends, and he's been doing that for awhile now. Do you believe you deserve better? You have two choices, either accept him as he is because sweetie, he isn't changing, or get out now. Its up to you.