Skyrim:Marriage. The UESPWiki – Your source for The Elder Scrolls since 1995.
Marriage is a gameplay element in The Elder Scrolls V: Skyrim. After obtaining the Amulet of Mara, the Dragonborn has the option to engage in marriage with an eligible NPC regardless of either party's gender in the potential marriage.
Be sure to own a house before re-attempting the marriage.
If you sleep in the house with your spouse, you will get a temporary bonus called, 'Lover's Comfort' that boosts your rate of skill-learning by 15% for eight hours. — Wikia - Elder Scrolls V: Skyrim - Marriage. If any, watch out for the following two bugs...
Strange Marriage Bug (help). Discussion in 'Skyrim Help' started by Johnnydeath, Nov 15, 2011.
Skyrim Meets Game of Thrones in Tribute Credits Sequence. Skyrim: House Buying Guide.
For more about marriage in Skyrim, see this Elder Scrolls wiki page or this Unofficial Elder Scrolls wiki page.
Multi Marriage by Jamce Skyrim » Quests and Adventures.
Derkeethus will still do his Duty at Darkwater Crossings after Marriage...since that place is awesomely far away from any buyable House he just seem to "bug" and stay there..
IGN tried to get married in Skyrim, but kept failing due to some lame corpse showing up at the ceremony and ruining it.