From Aristotle I have seen clearer that „philia“ what is mostly tranlated as „friendship“ and often is understood as „having friends“ means also „friendly love“.
It is a form of love.
And that enhances for me the meaning, it is for me something that we do, an attitude, virtue like prudence, feeling.
It reminds me of buddhist teaching in mahayana as in the image of a bird with 2 wings -> wisdom and compassion.
Similiar to this I see prudence (phronesis) and friendly love / friendship (philia) as the main Epicurean values.
But what is an „undying/immortal good“ when death is nothing to someone ? That friends maybe live longer than me ? Hm maybe, but it is about the mortality of the good.
When is a good mortal ?
Maybe something similiar like Plato forms but in realistic and earthed ? A good that is maybe not fleeting but maybe has a long endurance at least until the own death or that its consequences last longer maybe over the own death.
But that last aspect maybe confuses the mortality of humans with the mortality of goods ? 🙂🙃