There's something very sweet about that admission and at the very least it deserves another kiss. He was so in awe of Jack when this first started out that he could never have dreamed of him saying something like that to him. Even now it still means more than he can say to hear it. It makes him more determined than ever to make this work, through the good and the bad, and it seems a good place to end that particular topic for today.
"We should probably get back to work." Despite those words he makes no move to pull away.