Halsin's solomanced epilogue devastates me without fail EVERY TIME.
He thought it would be a mistake to go. He was certain that you, connecting with your old friends, would realize you were absolutely miserable with him at the commune, and you would leave. For the first time in his life, Halsin didn't want to roam anymore- he wanted to stay somewhere safe and comforting, and that included you. But he was sure coming was going to change all of that and make you leave him.
But he still went, partly because he missed your friends so much, and partly because he knew, if that was the case, he still needed to let you discover that. That once again, he couldn't "hoard you to himself" and be selfish. So he went, certain that any moment, you'd return to him and say it was over, and you'd found a new adventure to start without him.
It kills me that he doesn't even try to stop you! He lays out his concerns, so vulnerable but so matter-of-fact. Knowing it isn't his place to change your mind.
"You could have done anything. Gone with anyone. Yet you chose me." There's just so much... unspoken pain and confusion in that statement. He doesn't understand how or why you could have chosen him above anyone else. And for that reason alone, his own inability to see how special he is (ironic coming from the one who tells YOU back in your romance scene together that you are too modest, not realizing how special YOU are) he is certain you're about to leave him, but unlike in the act 3 romance scene where he's sure you're about to leave him for accidentally wildshaping, there's no frantically-stammered excuses. Just heartbroken acceptance.
And then, when you reassure him that of course you're staying, of course you're happy with him?
"I am still expecting to... stir from the dream."
"Forgive me. This past while has been so idyllic that I almost fear something must go wrong."
Which is a sign that on top of his insecurities and abandonment issues, this man very much does have trauma/PTSD. Because people with trauma? They're really good at living through a crisis, and really bad at NOT being in one. How do you function when there's nothing to fix? Nothing going wrong? No fires to put out? Too much quiet makes the noise inside of you louder, and that's harder to ignore than external noise. So when that happens, you start worrying about what must be about to go wrong- and for Halsin, that was losing you. He was so sure that his happiness was going to be fleeting at best that he convinced himself that you were only going to be a part of it so long as you weren't reminded of how much you loved adventuring with your friends, that the instant you remembered what the alternatives to him were, you'd take them.
It breaks my damn heart, and it makes me so happy you get to promise him that he is exactly what you want, no more and no less.