portrait alive > living likeness
4 How fair he was, and yet not fair to this,
to > compared with
5 And how he slew with glancing dart amiss
he > (Either Silvanus (following Myth.), or Cyparissus (following Met.))
6 A gentle hind, which the lovely boy 7 Did love as life, above all worldly bliss; 8 For grief whereof the lad nould after joy,
nould > would not (past tense of "nill", derived from "ne will", hence Spenser's apostrophe; cf. 310.35:9) joy > rejoice
9 But pined away in anguish and self-willed annoy.
self-willed annoy > [wilful or self-imposed grief]
106.18