Love Interests has these relationships to other tropes:

parents kids shares a parent with:
All Girls Want Bad Boys
All Guys Want Cheerleaders
Beta Couple
Cake Eater
Damsel In Distress
Disposable Love Interest
First Love
Girl Of The Week
Implied Love Interest
Little Sister Heroine
Loves My Alter Ego
Love Triangle
Lust Object
Master Of The Mixed Message
Official Couple
Old Flame
Relationship Sue
Replacement Love Interest
Satellite Love Interest
Second Love
Settled For Gay
Single Woman Seeks Good Man
Student Teacher Romance
Temporary Love Interest
The Obstructive Love Interest
Third Option Love Interest
Unwanted Harem
Unwanted Spouse
You'll need to Get Known if you want to add or modify these relationships.