Drekdair

Update: I've returned from the Underdark, and it's still happening just like before. Is there really nothing I can do?

I'm not sure what I've done to cause it, but now Nathaniel "has nothing to say to me" and no more random flirts or whatever. He hasn't been turned to stone or imprisoned or anything else I've heard of breaking romances. I haven't said anything to upset him, installed any mods lately, or done anything else I can think of. I've tried selecting him and pressing k. I'm in chapter two doing the various stronghold quests and was at the point in the romance where you could first sleep together (or as I chose, slept next to him) - there was also that option when choosing to talk to him, but I either hadn't tried it yet, or picked it and said I wasn't ready (can't remember if I loaded my game after that).

The only thing I can think of that's happened lately is Aerie suddenly had a dialogue with me about the sun setting. Since I don't have a multiple romance mod installed and she's been in my party as long as him without doing that, I can only think that the romance with Nathaniel broke BEFORE that, causing her to try to romance me.

Are there any console commands or anything else I can try? I just realized I've stupidly saved in all my slots since this happened, thinking everything was OK (everything else was).