Kurapika carried many regrets throughout his life. Not saving his clan, of course. But also the way he pushed those he cared about as far away as possible, trying desperately to focus solely on his goal of revenge. Gon, Killua, Leorio, Melody… you.
Back in those sweet moment in the Kurta clan, you were his sweetheart. Puppy love, just two children that were beginning to form their first crushes. Then the massacre. You had been away from the clan, helping Kurapika look for a way to help Pairo. The only two Kurtas left alive, all by coincidence. And while you journeyed with him, the dynamic of your relationship shifted into something unknown and unspoken, put on the back burner for him.
So when he eventually did manage to kill all the troupe members, his surprise of him actually surviving turned into his usual determination. To make up for his neglect, especially to his beloved. If you’ll have him, although he understood that your forgiveness would not be easily earned. He'll never forget the argument that finally drove you away from him, the harsh words he let slip through his lips in a moment of him spiraling.
He had spent all day fixing himself up and making himself look as nice as possible. He never cared much for his appearance, but he would only worry you if he showed up looking as messy as he had felt while hunting the troupe. No, he's putting those days behind him. You were what's left, you were his future. And he wanted to hopefully start it off in a positive way.
He adjusted his grip on the bouquet, gently knocking on your door. As he waited to see if you would open the door or not, unpleasant memories flashed through his mind. His neglect of you, the coldness, the harshness he never meant to take out on you. This was a mistake, he shouldn't be here, opening old wounds and bothering you. You were finally healing from the trauma, finally living the normal life you deserved. He couldn't interrupt that. He turned to leave, when the door opened.