They're all still stinging from Kitty's loss but that won't last forever and he knows there are other people here who have caught Jack's eye from time to time. Kirk certainly comes to mind. Maybe what happened in that fake future was a good thing right now. He doesn't know if he'd be able to talk honestly about this otherwise.
"I understand. I did listen to what you were saying during our fight, even if I didn't want to hear it at the time." The smallest smile to make it clear he's not bringing up the fight to make it awkward. "I know the idea of being with the same person forever isn't you and I want to worknto understand that. I think we need to be careful though, and you need to know when you're not here I'll be with Spike. That made us much closer last time until we started excluding you and I think we all need to work to balance things out and avoid that this time."