I'm sooooo agree with you. That is what I like in Gui Li-Xue Qi, and that is why I really want to read their story! (finally, somebody understands me
). Their struggles to hold each other's feeling, to fight as well as to protect each other really made me feel for them. Gui Li always said that Biyao was the only one and that he was in evil way, but when Xue Qi was in danger, he instinctively protected her with all his might. Xue Qi also said that they were on opposite sides, but she got angry when someone hurt him.
This kinda tortured love really got to me and I really really want to see them have a happy ending. That is why I have been so worried if the series won't do this justice and decided to be 'creative' with the love story. It's not that I don't like Biyao, but she only appeared for a short time in the book. Yes, she was an important person for Gui Li, but the thing that I like from Zhu Xian love story is how it told us that basically life went on. We could have many hardships, one after another, broken hearted again and again, but we survived anyway and moved on, and finally accepted things. So it's not a mater of lovey-dovey and push-pull kinda love, like what happened in other drama nowadays. It is more mature than that.
And I agree that Xue Qi unwavering love is the one that helps him a lot. I always feel that Xiao Fan is a 'lost soul', someone who needs guidance and warmth. If he is let to be alone, then he could go crazy and walk to the wrong path. And because he is very stubborn, he needs someone to pull him back to the right track. That is what Xue Qi, and his friend(s?) are trying to do.