[He shakes his head. But the mention of being older and in less shape reminds him of things he remembers the Old Spock showing him when they mind melded on Delta Vega. Suddenly a lot of shit makes a whole lot more sense.]

I think you're thinking of a different me. Long story and the fault of some Romulans with misguided revenge schemes, but I'm not that Kirk.

We ended up in a different timeline when the Romulans went back in time and destroyed Vulcan.