There are several stages to a friendly relationship. To create a friendly relationship between two Sims, have them do interactions such as 'Be Nice', 'Bro Hug', or 'Chest Bump'. As a pair of Sims advance through each stage, they earn a certain amount of Simoleons and XP (experience points). Once the Sims reach the Best Friend stage, they cannot go over it and it will stay that way unless they're romantic or complain.
There are several stages to romantic relationships. To create a romantic relationship between two Sims, have them do actions such as 'Be Romantic' and 'Kiss Hand' (only for budding romance or above) or 'WooHoo' (only available for partners, engaged and married). As a pair of Sims advance through each stage, a certain amount of Simoleons and XP will be received.
Budding Romance + 150xp
Engagement rings in The Sims FreePlay.
Date + 200xp
Partners + 250xp
Engaged +300xp
Married +350xp
When two Sims become partners, the option of 'Propose Marriage' is available. You will be prompted to buy an engagement ring. The higher in value the ring, the more likely the Sim will accept. After the sim accepts, they will become engaged. The two Sims will not be married until they move in together. A married couple can buy a crib and have a baby (click on the crib and you will be prompted to create the baby).
If a married couple breaks up, the player will need an Eternity Ring to get them back together, which costs 10 LP .
Nemesis Relationships
There are several stages to unfriendly relationships. To create an unfriendly relationship between two Sims, have them do actions such as 'Be Rude', 'Complain', 'Rude Hand Gesture' & the 'Slap'. As a pair of Sims advance through each stage, a certain amount of Simoleons and XP will be received. Once the Sims reach Nemesis, they cannot go over it and it will stay that way unless they're nice to each other to become friends.
Dislike + 150xp
Enemy + 200xp
Nemesis + 300xp
Teen Idol Relationship With Teen
There's a new hobby in the Teen Update, named Teen Idol. Teen Idol can interact with Teens such as 'Take Selfie with Fan', 'Help Fan Swooning' and 'Sign Autograph'. To have this interaction with Teen Idols,you need to finish the quest "The Road To Fame”. Teen Idols can 'Take Selfie With Fan' if they are good friends or best friends with another teen. 'Help Fan Swooning' and 'Sign Autograph' is for good friend and best friend relationship stages only.
Preteen Relationship With Teen
If they dislike each other, the teen might give noogie to the preteen.
Different Colored Relationships
There are four different coloured interactions available for your Sims to perform.
Green interactions will cultivate friendship between Sims.
Purple or Pink interactions will cultivate a romance between Sims.
Red interactions will degrade the current relationship and eventually give Sims the option to break up if they are romantically involved or divorce if they are married.
Blue interactions mean that they were romantic to each other but now are acting friendly or the other way around. Sims will be strangers and acquaintances in this stage.
Trivia
Sims cannot be romantic with each other until you complete the 'Love Is In The Air ' quest.
Married Sims cannot have babies until you complete the 'Two And A Half Sims' quest.
