Beh, grazie, migliore amica! and Beh, grazie, migliore amico! are Italian equivalents of the English phrase "Why, thank you, best friend!" Context makes clear whether a female (case 1) or a male (example 2) suits. The respective pronunciations will be "beh, GRA-tsyey mee-LYO-rey a-MEE-ka" in the feminine and "beh GRA-tsyey mee-LYO-rey a-MEE-ko" in the masculine in Pisan Italian.
"No thank you!" in English means No, grazie! in Italian.
You can say "Thank you for accepting me as your friend" in English.
"Why thank you?" in English means Perché grazie? in Italian.
Grazie
"Thank you, God!" in English means Grazie, Dio! in Italian.
"Thank you, my darling!" in English is Grazie, tesoro mio! in Italian.
Eskerrik asko
You say "tack"
That means "thanks" or "thank you".
"Thank you for the egg!" in English means Grazie per l'uovo! in Itailan.
"Thank you for adding me!" in English is Ti ringrazio per avermi aggiunto! in Italian.
"A very big thank you!" in English means Grazie mille! in Italian.