Furball:
Yes, I think he gave up 1-2 lives to save XY after the cherry blossom death trap, at least 1 life to save Jing, at least 1 life to save XY after she poisons her cousin and self, and when XY’s bug was removed it really damaged his life span. So at minimum, that’s 5 lives right there? Someone else may have a more accurate tally from the novel.
1. Someone please correct me if I'm mistaken, but to my knowledge, XL did not lose any lives over saving XY after the cherry blossom maze trap. He fed her soul essence blood to slowly bring her back to life, but did not have to give up his life to nurse her back to life
2. To my knowledge, he also did not have to give up one of his lives to save Jing.
3. When XL killed the loversbug, he used one or two of his lives to kill the loversbug.
I keep thinking that XL gave his life more than just once for XY, but they weren't during the incidents you mentioned in point 1 & 2.