I love it when people act like Alice S30 is a full on adult who figured out the meaning of life when interpreting her isolated, cherry picked sentences without any context.
I also love it when people who read English translations, completely disregard the fact that "love" can be used in dozens of other contexts, both in English and much more so in plenty other languages.
At most, Alice is making a joke, at worst, he simply falls into the same trap many wishful shippers do. Mistaking the context of the word "love".
Alice is confused enough in terms of many contexts as is, having her entire life removed from her memories, brainwashed into being an emotionless servant knight, figuring out that she had lived a lie and finally learns about a variety of conflicting emotions that she cannot grasp fully etc. It's the same case as Premiere in the Gameverse. She observes to understand human emotions, but the emotions are so nuanced that she keeps claiming she loves Kirito and that she is his "mistress" because Asuna is his "wife", solely based on the fact that Kirito fails to provide a decent explanation of what these concepts mean.