[He'll go back to being whimsical and fickle soon, no worries. On the other hand his expression shows no tells and he's letting his hand sift through another pile to occupy him.]

The only other option then is to wait until he asks you which also seems sort of dumb, since then you might both be waiting for the other person to ask when you could just ask each other. [And not ask him. John Egbert is not qualified for this. John Egbert is barely qualified to handle the knowledge his alternate self dated a Serket.] Anyway either he still cares or you don't know him as well as you think. Which is it?

[...maybe that's blunt, but Jake did just finish saying that he thought it wasn't possible for Dirk to stop caring. So if that's true, then...well, who knows. It's hard to say when he's still getting a feel for who they really are.]