who says, "Do you think, Victor... that i do not suffer also? No one could love a child more than i loved your brother..." what is the context of this quote? What is the speaker referring to and comparing?

Victor's father makes this comment after William's death; he is assuming that William's death is affecting Victor in the same way that it affects Alphonse. The truth is that Victor's grief goes far beyond the love of one family member for another; Victor, however, is fairly certain of the cause of William's death and knows that Justine is also going to be a victim of the Monster.