Co-Dependency Anyone?

DAMN IT! Why can't I just let him go? This is like a death in my family. In a sense, I guess it is. It is not a healthy relationship. We fight all the dang time. He's just been a part of it for so long, I can't let go. Last night I dreamed he was walking out of his bathroom I woke up and reached out for him and he wasn't really there. It was very depressing. I don't know if I can do this. I know it's better for me and my girls to not be with such a negative person, he's like a friggin' drug. If the physical aspect of our relationship wasn't sooooo good, when it happened, it would probably be alot easier. I just don't know what to do. God, please give me strength.