Dragon Age: Origins
I dunno, I'm pretty sure you can marry him provided that you're a female and you have a high enough persuasion skill...not even sure if you have to be human...
Regardless of race, you can do any romance line for your sex.
Minor spoilers: Link should give you an idea of which romance options are possible.
no you can't marry as a human mage
Must be a noble character to do so. which is dumb. anora wasn't of noble blood and she gets to marry the king. Lol so when Alistair said I'm not a noble so he can't marry my mage. I chose Anora to rule alone.
Well, Anora is a noble blood because his father fought and earned his way to royalty. Loghain and Maric (I think) freed Ferelden from the Orlsesians. Maric became the king and Loghain became his general after the war (or right hand I guess). So yes, the way I understand the story is that Loghain was a farmer before he became a noble (or a member of royalty).