Spoilers!!
I'm glad you enjoyed the game! When you die in an instant.... are you clicking "MERCY"? Clicking that would kill you in an instant and send you back to the beginning. When it's his special attack and he's just standing there, you have to find the "FIGHT" option. It's somewhere there on the screen.
!! Spoiler for the fight
The hidden "FIGHT" button is under the textbox. You have to click the textbox and drag it. :) That will secure your victory and complete the No Love route.