No.

[What did he say no to, exactly? There's no telling just what he meant, but when Gilgamesh leans forward, and kisses Setsuna on the corner of his lip, it becomes clearer. And he wants to do more than that, doesn't want to settle for just one; but Gilgamesh hasn't forgotten that look Setsuna pitched him in the field of flowers. It reminds him of what he can never have, no matter how hard and how far he presses.

But Gilgamesh was ever himself, so in the end, it didn't stop him. In the end, no matter what Setsuna did or said, he would pursue this path. He would grab the man by the hand and force him along until he ran and smiled as freely as the King. They were both immortals, both had plenty of time. So that is the choice Gilgamesh made, right then and there, on the couch beside him: I will fight for you, and I will never stop.

Gilgamesh backs away, looks away, and starts again, more softly:]

To love others, you must love yourself. And until I am drained absolutely dry, until I can no longer draw breath...

[They are people who chose the path of loneliness. But Gilgamesh bucks against it. And he knows, deep down, Setsuna wishes to do the same.]

I will teach you how to do so. Such is the everlasting decree of this everlasting King.