What does eres muy elegante mean?

"Tú eres dulce pa' dicerme esto" means "You are sweet for telling me this" however it is misspelled and uses improper phrasing.

"Tu eres dulce por decirme esto" is a better, though still awkward way to say this sentence.

Pa' is a contraction of the Spanish Word "para" which in this context means "for". However the Spanish Word "por" (by) can also translate to English as "for" and in this case would be the preferred Word.