No one would wish for his friend to become God. A man wishes for his friends all of the greatest goods but one, that he be like God. But in a deeper sense for Aristotle, all love of others is based on self-love. It is out of one's own goodness that one wishes well to another who is seen to be good. One both needs and does not need others.
Friends are a desirable extra.
Human beings are more independent of external conditions than are plants and animals, but they are not absolutely independent of anything outside of themselves as God is. God needs nothing outside of himself. Aristotle spends much of Book IX in a very strained attempt to show that the supremely happy man, who is self-sufficient and quite content in himself, nevertheless needs friends. Aristotle witnessed the beginnings of the breakdown of the city-state. Self-realization is the key term.