Why might it be bad spelling? You got this out of a personal communication? Not out of a published work?
dejame - let me (deja + me)
decirte - to tell you (decir + te)
fea - ugly (If you think the context makes a difference, you have to give the context in your question!)
cresera?? - possibly crecera' - will grow or
creciera - would grow - for s.o. to grow - depends on context.
la pue
rta del sol - the gate/door of the sun = sungate - sounds like a place.
bisto ??? - bistro?
-mente = -ly
sentimentalmente - sentimentally - in a sentimental way
ami - possibly short for amigo - friend (?)
Jim