"Naj naj" po polsku -- co to znaczy? Najlepsza? (na przykład -- "jesteś naj naj!" Dzięki

I just received an email from my Polish boyfriend who subjected the title of his email "Jesteś taka śliczna". Hopefully, this won't be something inappropriate to translate but if anyone can, please let me know what it means. If you help me out, I will continually ask you for help since he'll be sending me emails as long as I'm gone.

I need to know how to write the word for "kitty" in Polish. I just adopted a cat from a Polish lady who would call the cat "keet-cha" (phonetci spelling). "Keet-cha" is the word for kitty she said, and the cat only answers me when I call her that. Does anyone who speaks Polish know how to write and spell that word so I know how to write it? It is her new name. Thank you!

whats the translation of "but mommy raised me right" in polish?