[His smile softens a little, just a touch sad for one moment, before he squeezes his arm gently, touch lingering.]
I do know that. It's... you don't know what it means to me, to know that.
[He has no idea, of course, what Lucifer told you-- that you're even aware that there are things he hasn't talked about yet with you. So welp.]
I don't know what I'd do without you. Explode, probably. [He means it as a joke, but really. He knows his method of internalizing everything and never talk about it isn't exactly. healthy.]