Kakashi and Lin were classmates, and their teacher was Naruto's father. As an only child, Lin naturally received a lot of care. There is no doubt that she likes Lin very much. This kind of love is between men and women.
In the Battle of Shenqiao, Lin was caught by Yin Yan Ninja, and Daitu persuaded Kakashi to save Lin together. They successfully saved Lin, but Detu was crushed by the rock on her right. Finally, Detu gave his left eye to Kakashi to take good care of Lin. In fact, however, Dai Tu was saved by Spot and did not die.
Later, Kakashi and Lin were trapped by fog endurance while performing their tasks. At this point, Lin's body has been implanted with three extremely unstable tails. Wu Ren tried to destroy Konoha by Lin's hand. Lin knew this well, so he took the initiative to hit the thousand birds that Kakashi had originally prepared as enemies and ended his life. And all this happened to be seen by Tui, who came here to save people and witnessed the girl she loved being killed by her trust and eloping with Tui. Later, Ban told Push about the plan of Infinite Harle, and Push started the road of revenge to the whole forbearance world.
However, everything is actually planned by Spot. Spot asked Bai Jue to tell Detu that Kakashi and Kathleen were trapped, and just let Detu see the scene where Kakashi killed Kathleen, so the black hand behind it was Spot. Fortunately, Detu finally woke up and gave Kakashi the last help.