"When the stars are down when the day is done When the lights are out like the love is gone I will fill your heart with afterglow afterglow When it’s been a long time since goodbye When we both have walked a thousand miles We will still remember afterglow afterglow.."

Why is it in love stories that the guy always ends up leaving the girl for his reasons and lying to her just so she can be happy with a new life. Why cant it be