I don't know if this story will help you, but to me it was quite an eye opener.
I knew a lady once whose husband left her for a younger woman. She was devestated. She had been a faithful wife, had three young girls and was a christian at the time (as far as I'm aware.)
Anyway she hadn't seen it coming and was completly shattered. One day she was standing in the shower sobbing (as was fairly usual I understand) and God spoke to her in an audible voice. He said to her 'you are allowing, one man, to ruin your whole life.'
That was a turning point for her.
Sometimes we can let another human being ruin our life. But we can change that by our attitude and corresponding actions.