I've gotten the "you saw to my needs here in camp with the care of a lover, not a host" line in a save started after patch 6, where I didn't flirt (deliberately, anyway). I'm pretty sure it was caused by asking how he was finding camp, then telling him, "You'll find plenty of books before long. I keep coming across them everywhere" when he said he would miss his books. Apparently his response to that sets the "CAMP_Halsin2_Event_FlirtedWithHalsinInWLDMainA" flag. This doesn't seem flirty at all to me, so I think it's mis-flaged.
I've also experienced barely talking to him at the Tiefling party, only to be given the option to apologize for coming on too strong.
I was disappointed that I had accidentally triggered the "flirt" line, because I had wanted to see get platonic dialogue added in patch 6. It's a shame that to get that friendship dialogue, you currently have to avoid some friendly conversations. I could tell Halsin was on his romance path when he said his "Not what. Who" line, but I couldn't turn him down until the next act.
