
Kokuto:
I don't know. I don't think XL ever let go of his love for XY. The only thing he let go is his chance to have a future WITH her.
Speaking of the bugs and them feeding ... which I'm not sure of, but they are definitely multiplying from what someone posted from the novel when XL killed them. I posted this in the season 2 gallery, and just realized it also showed all the bugs floating in the lake -- as well as XL missing one head.

The leaked script describes it thus:
XL: Silly girl, to even dare to recklessly plant the lovers bug that connects hearts and lives! "The sycamore trees on the ground will grow old intertwined, the mythical jian bird in the sky will not fly alone, the mandarin ducks in the water will die together." The lovers bug connects our hearts and lives, and is impossible to remove. Back then, I was able to remove the bug from Cang Xuan only because he did not willingly accept the bug, so you never properly plant the bug in him in the first place. I however, was wholeheartedly willing, and allowed you to properly plant it in me. You kept asking me to remove the bug and I kept telling you it was not possible. You never believed me, but I was not lying. I really cannot remove it.
Using his finger as a knife, Xiang Liu slashed two cuts on Xiao Yao and his own palms.
XL: I may not be able to remove the bug, but I can kill it (sly smile) Don't blame me for deceiving you. Who told you to only ask me whether I could remove the bug, but never asked whether I could kill it.
With a smile, Xiang Liu held Xiao Yao's two hands in his. Their palms were joined, blood and flesh intermingling and Xiang Liu began to chant the bug spell. As he chanted, glowing lights emerged from their bodies like countless fireflies flying around them. There were fireflies all over the night sky and the lake surface. The lights on the surface of the water, and the reflection beneath complemented each other perfectly, what was real mixed with what was not. It seemed that lights covered the sky and the depths of the water, as mesmerising as a dream.
From behind Xiang Liu emerged the reflection of the nine-headed demon's true form, except there were only eight heads left, one life having been sacrificed to save Xiao Yao years ago. A razor sharp dagger made of ice appeared in Xiang Liu's hand. Ruthlessly, he stabbed the dagger into his own heart, and one of his heads disappeared in agony. Xiang Liu pulled out the dagger and blood gushed forth from the wound, spilling on to the seashell and Xiao Yao's body. His seven-headed form was visibly weakened.