If you didn't, who did?
No, his actions caused this. You can't control that, but you can control how you handle the situation. It seems that you are taking steps to get out of his house, that's good.
Believe it or not, you were. You were both using each other, he used you for your youth, you used him as an escape. You probably did love him, but it's almost clear that you had a co-dependent relationship.
You may not want to hear these things, but it's a necessary part of growing up. The last thing you'd want to do is fall into a pattern of blaming other people for your problems. Trust me, I used to do it all the time. Look at your situation, ask how you got there, and figure out how to not let it happen again. That's called growth.
Bonus points if you can forgive him. Forgiveness is another one of those tough lessons, until you forgive him he's going to have complete power over your emotions. Before you were literally his slave, now you're emotionally his slave. He's not going to break the chains, we can't (though we would if we could), you're the only one who can turn off this attachment that you have to him.
I promise you that if you don't forgive him and let it go it's going to eat you alive and ruin you.