6 For-thy he thrilled you with a leaden dart,
For-thy > For that reason thrilled > pierced leaden > (Cupid's gold-tipped and lead-tipped arrows bring happy or unhappy love respectively. See Met. 1.466-71)
7 To love fair Daphne, who you loved less:
Daphne > (Apollo's love (see 212.52:5), transformed into a laurel; but according to Met. 4.171 ff. Apollo was punished for his indiscretion by being made to love Leucothea, who was buried alive by her father, whereupon Apollo transformed her into an incense bush) you loved less > loved you too little
8 Less she you loved, than was your just desert,
desert > reward, merit
9 Yet was your love her death, and her death was your smart.
smart > pain, acute pain
311.37
So louedst thou the lusty Hyacinct,
2 So louedst thou the faire Coronis deare:
Yet both are of thy haplesse hand extinct,
4 Yet both in flowres do liue, and loue thee beare,
The one a Paunce, the other a sweet breare:
6 For griefe whereof, ye mote haue liuely seene
The God himselfe rending his golden heare,
8 And breaking quite his +gyrlond+ euer greene,
With other signes of sorrow and impatient teene.