I had an idea that you can apply to romance with Xan (when Xan the dead.) I find it strange that you can not think so here it goes:
When you get to the temple of Myr, and appears Gorion, Xan may appears too.
He would say that he died for you, tell you how you may be accompanying Sarevok,(or Irenicus if you have LR) he say that he was hoped you were smarter and remember that you'll never be with him...and all this is for you fault ... Well, you tell the most cruel things you can imagine. Valygar can have a couple of words trying to make reason and Xan you enter will respond that "I seem to have forgotten me and have been replaced by the browser"
When you beat the shadow, have a quick conversation with Valygar and maybe a few days later, another dream where Xan is cheer / calm down.
What do you think?