Formal:
* अलविदा, प्रिय (Alvida, priya) - This is a direct translation of "goodbye, dear" and is suitable for a more formal setting.
Informal:
* अलविदा, प्यारे (Alvida, pyare) - This is a more informal way of saying "goodbye, dear" and is suitable for close friends or family.
* खुदा हाफ़िज़, प्यारे (Khuda hafiz, pyare) - This means "God keep you safe, dear" and is a very common way to say goodbye in Hindi.
* नमस्ते, प्यारे (Namaste, pyare) - This means "hello/goodbye, dear" and is a polite way to say goodbye in Hindi.
Romantic:
* अलविदा, मेरे प्यार (Alvida, mere pyaar) - This means "goodbye, my love" and is a very romantic way to say goodbye.
* तुम्हें बहुत याद करूँगा/करूँगी (Tumhen bahut yaad karoonga/karoongi) - This means "I will miss you very much" and is a very sweet and romantic way to say goodbye.
The best way to choose the right phrase is to consider your relationship with the person and the context of the situation.