Instructions
Select "Ask If Single" and "Ask Sign" from the dialogue options that appear when you click on the male Sim you are romancing. This lets you and your Sim know the status of the guy you are trying to romance and if the two Sims are compatible.
Perform interactions, such as "Chat" or "Compliment," that the male Sim enjoys to raise his friendship bar, located in the bottom right corner of the screen. If the male Sim enjoys an interaction, a green plus-sign appears over his head.
Perform flirty interactions to gauge the male Sim's interest. Actions such as "Pick Up Line" or "Flirt" can help you decide if the male Sim is interested. If a green plus-sign appears over his head, he is interested in your Sim.
Select "Confess Attraction" or "First Kiss" when the male Sim's friendship bar is halfway full. If the interaction is successful, a heart appears next to the Sim's picture in the bottom right corner of the screen. This Sim is now a Romantic Interest and is in love with your Sim.
Select "Propose Going Steady" to make the male Sim your boyfriend. Continue to perform romantic interactions to access the "Propose Marriage" interaction, allowing you to marry your love interest.