Now I am not an English major, not even a lieutenant, but I found a scan that is not smudgy at all, and which reads: "Although the woes at first seemed double ...".

The explanation is also given in rhymes: the lady had pretended to be "disloyal" in order to test the gentleman's love, and is now certain of it and agrees to marry him. The green willow may have been worn as a visible sign that the wearer feels committed to a proposal of marriage (though it does not say to how many ladies ...). A white handkerchief or flower may have been used as a token of brideship, a cheaper alternative to an engagement ring. Pure guesswork, of course; enlightenment is welcome.

Yes, it is a lovely poem.