Analysis of A Revocation

WHAT should I say?
   --Since Faith is dead,
And Truth away
   From you is fled?
   Should I be led
   With doubleness?
   Nay! nay! mistress.

I promised you,
   And you promised me,
To be as true
   As I would be.
   But since I see
   Your double heart,
   Farewell my part!

Thought for to take
   'Tis not my mind;
But to forsake
   One so unkind;
   And as I find
   So will I trust.
   Farewell, unjust!

Can ye say nay
   But that you said
That I alway
   Should be obeyed?
   And--thus betrayed
   Or that I wist!
   Farewell, unkist!