Yes, @Open Eyes, that but also he knocked on her door when she was lonely and therefore, she allowed the door to be opened again. I know that one all too well.

Each time I've gotten involved in the wrong relationship is when I've been lonely and took whatever came to me, or whomever showed me some attention first.

That's the thing to be corrected. Is to have caution up and to take precaution at all times, especially when we're at our loneliest. Anyone can come knocking, but it then up to us to be discerning about to whom we open the door. It cannot just be anyone. It should be someone worthy of our attention and time. We don't know in the beginning whether they truly are worthy. So that's why we have to get to know someone for a while before committing emotionally to them.

And Gymgirl said she was lonely, so she allowed the door to be opened, even though she knew he was bad for her.