The good deeds, or the right actions that follow from self love must be directed somewhere and that generally means directed to others. In plain words we need others to do good deeds to. Reciprocally, in misfortune we need those who will direct good to us. Consequently a happy man needs society and friends. Intelligence in turn is necessarily direct outwards and usually toward others.
Love of self reflects necessarily as love of others.
These other selves to whom our reflected intelligence is directed, are desirable and pleasant too. After all, if intelligence was not good, friends might not enhance our happiness. Humans, Aristotle, notes are composites of soul and body, and far from able to identify completely with intelligence. Friends come in handy, it seems, even for those absorbed in purely theoretical pursuits.