ἐγὼ δὲ ἀγαπῶ, ἐὰν μὴ ἐλάττω καταλίπω τουτοισί, ἀλλὰ βραχεῖ γέ τινι πλείω ἢ παρέλαβον.
Does the ἢ mean "instead" there, to signal the contrast against μὴ ἐλάττω καταλίπω? "...rather for them to have received a little bit more instead."
Also someone may wish to explain the aorist παρέλαβον to me there, referring to this future event.
And completely unrelated on the next line:
Οὗ τοι ἕνεκα ἠρόμην, ἦν δ’ ἐγώ, ὅτι μοι ἔδοξας οὐ ...