Spike will never not be surprised at what people consider work and yes, in this particular scenario he does have the answers. Maybe it's tiresome to hear about that century long relationship of his but that's also his greatest strengths - he learned a lot during that time, about sacrificing and listening and looking after and sure, it wasn't exactly a balanced relationship but it worked and blossomed and thrived. If it hadn't been for Angelus, it wouldn't have ended, he's sure of it.
But that was then and this is now and he takes the punch, stumbles, snarls into game face as he turns back to Jack, aiming to get a grab on him and push him up against the bar.