ex-girlfriend (n)

An ex-girlfriend found his name on a social networking site and emailed him.
In my last relationship, my ex-girlfriend and I shared many memorable moments together.
I bumped into my ex-girlfriend at the grocery store yesterday, and it was a bit awkward.
Despite the breakup, I genuinely wish my ex-girlfriend all the best in her future endeavors.
It took some time, but I've finally moved on from my ex-girlfriend and am focusing on personal growth.