So, do you still need to be around them? Or can you leave now? Because if you can do that... then do that.
He has always been who he has always been, and he always will be. He never loved anyone more than himself. He will never be a good thing for you.
You've done your time. You can walk free whenever you have the resources to do so. As soon as you realise something is from him, delete it. I know it's hard, family is family. But sometimes family is really damaging, and when its like that its okay to walk away. You are 21. You can make a new life for yourself now.