Being in an abusive relationship is never ok, if someone truly loved you then they wouldn't do that to you. How could they? how could you cause the one you love so much pain...
It reminds me of another song that covers a similar subject.
What is the saddest though is when this abuse is directed towards children, the innocents that just can't stand up for themselves. It breaks my heart when you hear of stories like this.
Don't forget that this happens, it's not OK and needs to be stopped.