I speak not this to condemn you: for I have said before, that ye are in our hearts to die and live with you.
In vindicating myself, I do not accuse you, as though you suspected me of such things (Menochius) - as though you were guilty of such things; for I speak only of the false apostles (Estius). Rather, 'as though you were ungrateful' (Beza).
I have said before - in 2 Corinthians 6:11-12.
Die and live with you - the height of friendship. I am ready to die and live with and for you (Philippians 1:7; Philippians 1:20; Philippians 1:24; Philippians 2:17-18: cf. as to Christ, John 10:11).