I thought that's exactly what she's implying. That the value of true friendship is incomparable to mere sex or even romance, for that matter. The latter can of course be wonderful things, but they are brief and sticky (in more ways than one); love for a friend is fulfilling in ways that even the wettest sapphistry could never touch!
There are more things in heaven and earth, Horatio,
Than are dreamt of in your philosophy.