Luka stayed quiet after that and Xavier didn't know what to say. Recently, that's all Xavier could say about himself. Not knowing what to say.
Despite everything that had happened to them and kept happening, Xavier always thought that in the end, the two of them—and after a while, the three of them—will always end up together because that was what they were.
Family. Luka was his soulmate. Luka is his soulmate. The reason that Xavier fell in love with him wasn't because of the soulmate bond.
It was because that Luka was made for Xavier to love and so was Xavier made for Luka's love. That's just the way it worked. With or without a bond, if the two of them had met on Earth as humans, Xavier knew that he would fall for Luka all over again.