funesto
ill-fated, fateful

amita
Diminutive of ama, 'mistress' (not of amiga, 'friend'!)

traje bajo
a long dress (because she had grown up)

estaba serio
Try to convey the force of Spanish estar here (perhaps translate 'my countenance was serious')

soliloquios
lit. 'soliloquies', but this has a dramatic connotation in English: perhaps take in the idea of probaba as well and translate 'I demonstrated to myself'

aturdir
to stun

varas
an old measure of length; translate as 'yards'

displicencia
peevishness

faenas
tasks (especially used of household chores)

cómplice
accomplice

reprender
to reprimand

holgazanería
idleness

carrera
race

pescozón
a blow on the neck (from pescuezo); the translation will need to be a little less graphic, or it will sound rather violent: perhaps 'a tap on my neck'

naranjo
orange tree

azahar
orange blossom

rapacidad
rapaciousness (we understand that he had gathered orange blossom, a symbol of love, for Rosita)

lozanía
luxuriance

pulgada
inch

tobillo
ankle