What does the Japanese kokoro itai mean in English?

"Kokoro" means heart and "itai" means hurt.

So basically, kokoro itai means "My heart is hurt," although it would be used the way that we would normally say "You've hurt me", or other variations. While helpful to understand what specific Words are being used, it does not make a natural sentence in either language to translate Word for Word when constructing sentences.

心がいたいよ kokoroga itaiyo would be more natural.