'Anata no koto wo kesshite wasurenai' is one way you may say it.
it's 忘れられない(wasure rarenai).
White when translated from English to Japanese is shiro for shiro means white
Dog in Japanese is 'inu'.
Chocolate is 'chokoreeto' in Japanese.
Owari
Domo.
Koibito.
Sakarerumono
Yonbanme
何 (nani)
Hajime mashite?
Sumimasen.