やっぱりお前はさぁ…っ、こんなにも、こんなにもさぁ…
My translation: After all you are...., so much, so much
What was this guy trying to say? Or is it incomplete on purpose? Even with context I don't get it. I would like to know if there's something I haven't seen and that's the reason my translation is bad and everything actually makes sense.
Yes it's an incomplete sentence similar to "You... what a ..." or "You're such a ...". This is not an idiomatic expression with a hidden meaning that would surprise you. こんなにも is an adverbial expression similar to this as in this big, and thus some adjective is missing after it.
The unsaid part purely depends on the context. I don't know why the guy is so deeply impressed by お前. If you also don't know why, that probably means you are not following the story correctly.
