Yup
You need to wear the Amulet of Mara. Speak with Maramal about the Cult of Mara - you can find him at the Bee and Barb in Riften or at the Temple of Mara and you can buy the amulet from him for 200 gold or you can find it in a couple of other places, I believe. Wear the amulet and chat to someone who has expressed an interest in you and new dialogue options should appear. Propose, speak to Maramal again and arrange the wedding which takes place within 24 hours so best just to wait in the temple so you don't stand up your spouse. Say "I do" and job done 
Not tried it meself because no one will marry me
but if I can finally get some silly cow to agree, then I'll see what happens.


Not tried it meself because no one will marry me
