That's not true. Rewatch it. He says "I'm going to die!" Then he ponders the possibility of regeneration as "feeling like dying". But the scene definitely begins with him feeling his complete death could be imminent. It's a definite game over fear.
And then he mentions about a new man saunting off in his place and that "he" the Tenth version is dead. He's talking about him specifically dying... not the Doctor dying for good.
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And then he mentions about a new man saunting off in his place and that "he" the Tenth version is dead. He's talking about him specifically dying... not the Doctor dying for good.