He isn't in love with her anymore.
Truthfully, honestly he isn't, and he isn't lying to himself like before. Because it's been six years since then, and even he has learned how to let go. He feels a different love for her now, one that's soft and light and brimming with warmth.
And yet
It's been so many, many years since Haruhi showed up, turned their world upside down and cracked open their hearts. It's been such a long time...
There have been many dates since that era has passed. Many gone by, but never remained. When he gave up on her and let go, that winter's eve, he'd done so with the impression that his world was just starting to move and to breathe. And he'd truly believed, with all of his heart, that someday he'd find another girl, one who would solidify it.
He isn't in love with her anymore, and this isn't a lie like before. But perhaps, he thinks and is starting to believe, there will never be anyone like her again.