Mike Gayle: emotions you'll never forget, stories you'll want to share.Helen and Ben parted as heartbroken 18-year-olds and went their very separate ways.Twenty years later, mother-of-two-teenagers Helen is still in Manchester, a part-time primary teacher, stunned by the behaviour of her love-rat husband. In an old T shirt and scruffy jeans, she feels at the lowest point in her life.And suddenly, impossibly,