Don't take him in. People grow, and you can encourage/assist, but each person ultimately has to choose for themself. If he needed to get out from his abuser he

Don't take him in. People grow, and you can encourage/assist, but each person ultimately has to choose for themself. If he needed to get out from his abuser he could presumably do it on his own, with varying levels of difficulty / pain. The fact that he hasn't done so means you would be "saving" him, a terrible choice. Unless he takes the step himself to become a fully self-reliant adult he is very unlikely to become that person under your protection. Alternatively you could help him escape and provide a safe place for him to grow, while realizing that your relationship will probably be doomed in the process. I don't recommend this path.