Sims play dating relationship
Becoming friends will unlock the 'High Five' interaction, good friends will unlock 'Bro Hug' interaction, and best friends will unlock 'Chest Bump' interaction.
Preteens and older are able to have romantic relationships.
Not to be confused with characters upgrading their abilities by socialization.
Compare Relationship Reveal—a moment where an implied but existing couple becomes canon.
A move from casual to serious can involve I Got You a Drawer.
To create a romantic relationship between two Sims, have them do actions such as 'Be Romantic' or 'Woo Hoo' (only available for partners, engaged and married).
The moment when two characters become an Official Couple. In a work, it's that point where until further notice there's no more sense in asking Will They or Won't They? In Real Life, it's that point beyond which you'd feel justified calling the other person "my boyfriend/girlfriend".
When two Sims become partners, the option of 'Propose Marriage' is available. The higher in value the ring, the more likely the Sim will accept. The two Sims will not be married until they move in together.