The Path 2.45 of Final Fantasy XIV: A Realm Reborn now is releasing, the new version would be added a special quest that Eternal Bond. Actually, few MMORPG has the function of the wedding ceremony in the game, but Square Enix brings the gorgeous wedding ceremony during this new update version. 

If you want to hold a ceremony of Eternal Bonding in the game, you must first submit an application via the Final Fantasy XIV: Mog Station(the Eternal Bond site will available later on) then choose the wedding type, Standard Plan, Gold Plan, Platinum Plan. In the Gold Plan and Platinum Plan, there are special mount and more dress options as wedding gifts.

How to hold a ceremony of Eternal Bonding?
To submit application
To receive the special task
Completed task and get the wedding dress and ring
To choose the wedding plan
Reserve the wedding place
To send the invitation card

You can get married with any player, no matter what kind of race and gender. The host in the wedding, you can choose NPC, Priest. Meanwhile, in the Final Fantasy XIV Patch 2.45, there are new hair style for wedding, and new embrace action.

FFXIV Patch 2.45 Update Content:
-wedding(eternal bond):standard plan is free. Gold plan costs money but gets you mount+minion and more dress options.
-stoneskin 2 for white mage (cast stoneskin on the whole group)
-relic update (zodiac) with new models for the weapons
-slightly easier to get crafter gear
-ninja nerf

Dragoon Buffs
Magic Defense Up
Blood for Blood Damage Penalty Reduced
[Rumor] Jump Improvements
Positional Requirements no longer required for buffs/debuffs (only damage increases, similar to Monk)
Damage Increases