Childhood Friend Romance has these relationships to other tropes:

parents kids shares a parent with:
Childhood Friends
Just Friends
Childhood Marriage Promise
Patient Childhood Love Interest
parent child
Childhood FriendsBeleaguered Childhood Friend
''Forgotten Friend New Foe
''Forgotten Childhood Friend
Just FriendsBetter As Friends
''Stupid Sexy Friend
You'll need to Get Known if you want to add or modify these relationships.