There's absolutely no question in how he says it. A time will come when he will need the space, when he will demand answers and retreat again in order to process it. With Felicity there, with Sara, with Thea and so many others, Oliver will do what he always does. Set aside anything personal in favor of larger and far more complex goals, regardless of the cost.

But it's been a difficult year and a half. Slade Wilson. His company stolen not once but twice out from under him. His mother. Thea. Roy. He has lost so much but just this one time, Oliver was given something back. Something precious.
So he's going to be selfish, just this one time. He's going to sit with Sara, he's going to throw knives for no reason other than because they can.

And she understands. Of course she does. Sara understands him far better than anyone ever had. She won't press. Not tonight.

"Yeah, a drink sounds good."