Board Thread:Questions and Answers/@comment-27713352-20160922044803/@comment-30069705-20160925225907

Just the prior year, Isayama Hajime (the guy who does the actual manga) made it clear in an official interview that for Eren, rather than a lover, Mikasa's presence is more like a mother to him. He even went fairly in depth about it, even saying that just like towards one's actual mother, Eren will eventually get to a point where he moves away from Mikasa once he grows up and becomes independent from her, and that he might draw that scene one day.

Even Mikasa mainly considers Eren her "family" and might not actually have truly romantic feelings for him either, at least according to Isayama Hajime's actual manga and interviews and guidebooks.

That being said, I do believe that if these 2 were to ever get together with anyone, it would be each other. It's just I know better than to put it past the creator to not have them (or anyone for that matter) get together, and due to the nature of the series, it's probably better that way anyways. Attack On Titan, in general, doesn't really focus on romance or give its characters room or time for things like that. Even Eren is more concerned about saving and freeing everyone from the titans and Hometown warriors and titan shifters and exploring the world outside the walls and its many wonders, while Mikasa is more concerned about keeping her "family" alive. Plus, there's also that very realistic possibility everyone has of dying by the time the series finally ends, and even before that, Eren and Armin are going to oppose each other and go in separate directions due to their different ways of thinking, and Mikasa will also get caught up in that.