How do i say U are so sweet in farsi Persian?

There are a few ways to say "You are so sweet" in Persian, depending on the level of formality and the context:

Formal:

* شما خیلی مهربان هستید. (Shoma kheyli mehraban hastid.) - This is the most formal and polite way to say it, meaning "You are very kind."

* شما خیلی شیرین هستید. (Shoma kheyli shirin hastid.) - This also means "You are very sweet," but it has a slightly more romantic connotation.

Informal:

* تو خیلی مهربونی. (To kheyli mehraboni.) - This is the informal way to say "You are very kind."

* تو خیلی شیرینی. (To kheyli shirini.) - This is the informal way to say "You are very sweet."

* خیلی قشنگ حرف میزنی. (Kheyli qeshang harf mizani.) - This means "You speak very beautifully" and implies that the person is sweet and charming.

For a romantic context:

* خیلی دوست داشتنی هستی. (Kheyli dost dashtani hasti.) - This means "You are very lovable."

* خیلی نازنین هستی. (Kheyli nazenin hasti.) - This means "You are very precious."

You can also add a "خیلی" (kheyli) meaning "very" to any of these phrases to emphasize the sweetness.

For example:

* خیلی خیلی شیرین هستی. (Kheyli kheyli shirin hasti.) - You are very very sweet.

Remember to choose the appropriate phrase based on the context and your relationship with the person you are talking to.