Trials of Youth: During your childhood you underwent a coming of age event that greatly impacted your life. (Work with your DM to detirmine what this event is)
Rivalry: A rival to you or your family cause upheaval forcing you to relocate possibly to a far distant land. (Work with your DM to detirmine the details)
You find yourself in love with another, wither it is a fling or something more serious is up to you. (work with your DM to detirmine if it is ongoing or terminated)