I also mean that.
Diggle: I'm gonna stick by your side, for as long as I can. But I know you have to do this alone.
Oliver: Every mission has an end.
Diggle: I wish this one didn't.
Oliver: I couldn't of done any of this, any of it, without you. You've always been my rock.
Diggle: Don't you mean the best man you've ever known?
Oliver: I also mean that.