Socrates leads Lysis by the nose, and Lysis does not object. Socrates "interprets" the poet and the physikoi as claiming that only the similar to the simlar are friends, but if those who are dissimilar in themselves are bad, this means that only the good are friends. Since this doesn't cause Lysis to object, Socrates adds another problem, that the similar add nothing useful to the similar; if another adds nothing useful to oneself, why would one love such a person? The verb phileo (I love) is replaced by agapao (I am affectionate). Agape in modern Greek is the word for love. Philia is now reserved for friendship.

Here I read through Platonic dialogues, translating and commenting on the Greek text as I go.

The resulting analyses may be found at:
https://theplatoparadigm.com

The full analyses include Euthyphro, Io, Hippias Minor, and Lysis, with extract/summaries from my books on Hippias Major, Meno, and Politeia (Republic)