I don't see any romance with 11 and Clara, then again I don't really like Clara yet. I liked her in snowman and asluym of the daleks. I just don't get any sense of fun from her and she kind of comes off as a bit dull. Maybe I need to rewatch the episodes and I may change my mind. I also think part of it might be because she was scattered in time and space, so we didn't get her whole personality.
I don't think the Doctor should get with any of his companions. I never really bought the Rose/10 romance, it just came off as too immature to me. But I can see River and 11 being in love. I saw more of a connection between the two.