Boy Meets Girl has these relationships to other tropes:

parents kids shares a parent with:
Romance Arc
Meet Cute
parent child
Romance ArcThey Do
''Just Friends
''Will They Or Wont They
''Relationship Upgrade
''Did Not Get The Girl
''No Romantic Resolution
''Marry Them All
''Dump Them All
''Uptown Girl
''Romance Sidequest
You'll need to Get Known if you want to add or modify these relationships.