The Sims FreePlay allows players to have their Sims get married. If the mechanics haven't changed, here's how you can get married in The Sims FreePlay:
Reach Relationship Level 10: To get married, you need to have two Sims in a romantic relationship and have their relationship level reach Level 10. You can achieve this by performing romantic actions between the Sims, such as hugging, kissing, flirting, etc.
Purchase a Ring: Once the relationship level is at 10, you'll need to buy a ring for the proposal. Go to the "Specials" section in the Home Store, and you should find the option to purchase engagement rings.
Propose Marriage: After buying the ring, have one Sim initiate the "Propose Marriage" action on the other Sim. If they are in a good mood and have a strong relationship, the proposal should be successful, and the Sims will become engaged.
Plan the Wedding: Once engaged, a new set of goals and tasks related to the wedding will appear. You'll have to complete these tasks to move forward with the wedding preparations.
Complete the Wedding Goals: The wedding goals may include tasks like "Buy Wedding Outfits," "Get Married in a Park," "Have 5 Friends at the Wedding," etc. Complete these tasks to proceed with the wedding.
Hold the Wedding: Once all the goals are completed, you can hold the wedding. Choose a suitable venue and time for the ceremony, and then start the wedding event.
Enjoy the Wedding: During the wedding event, your Sims will go through the wedding ceremony, exchange vows, and complete various actions related to the celebration.
Marriage Complete: After the event is finished, your Sims will be officially married!
Keep in mind that since The Sims FreePlay is a mobile game, the mechanics or steps might have been updated or changed after my last knowledge update in 2023. So, it's a good idea to check for any in-game updates or tutorials for the most current information on how to get married in the game.