It can be something as simple as being friends, best friends, not-so close friends, or first girlfriend, first kiss, first (something else), or she stole my boyfriend in 7th grade, my prom date cheated on me with him, etc. Get colorful with it! It's life, things happen. Everyone isn't always in good terms with anyone!!
But don't forget to get the consent of the character's user if they're okay with that.
P.s. Just because "sue" is your first girlfriend, it doesn't have to be reciprocated.
Character Lists:
TBA