Addicted to me

My name is Faith and I live with my best friend Niall Horan. He gets over protective and he has a lot of anger problems. He doesn't want me getting hurt because of my past life when my old boyfriend Zack beat me. Ever sense Niall found out about it, he's protective and it's getting to be to much... He promised never to hurt me but will that change because of his anger problems? Will he feel differently about me? Will he lie to me?