But that wasn't about his love for the ship, it was about his hatred for the Borg, his refusal to give any more ground to them.
The ground in question is the ship. It is fruitless to split hairs on his mental processes, but I think it's sufficient to suggest the ship is not disposable to him in his obvious desire to harm the Borg (a little more than just a "tool" as another poster suggested).
Oh, come on, his mental processes are the whole
point of this discussion. We're not talking about his actions, we're talking about the
emotion that motivates those actions. I'll concede that he cared about the ship, since what drove him was his refusal to give up anything more he cared about to the Borg. But it's blatant that what was primarily motivating him at that point was obsession, rage, and hatred toward the Borg, not romantic infatuation with a starship.
Remember, when Lily convinced him to change his mind, the argument wasn't about his feelings for the ship, it was about his obsessive hatred of the Borg. Once she made him recognize that he was basing his decisions on vindictiveness and hate, he was able to switch gears and sacrifice the ship quite readily. Indeed, his valedictory words about the
Enterprise-E were almost dismissive. "There are plenty of letters left in the alphabet" is hardly a profession of love for the ship. If anything, it suggests he considers the ship merely an interchangeable part.