How do you say hallo my friend in Arabic?

There are a few ways to say "Hallo my friend" in Arabic, depending on the context and level of formality:

Formal:

* أهلاً صديقي (AhlaN Sadiqi) - This is the most formal way to greet a friend, literally meaning "Welcome, my friend."

Informal:

* مرحبا يا صديقي (Marhaba ya Sadiqi) - This is a more casual and friendly greeting, meaning "Hello, my friend."

* سلام يا صديقي (Salam ya Sadiqi) - This is a very informal greeting, meaning "Peace be upon you, my friend."

Other options:

* صباح الخير يا صديقي (Sabah al-khayr ya Sadiqi) - "Good morning, my friend."

* مساء الخير يا صديقي (Masaa al-khayr ya Sadiqi) - "Good evening, my friend."

It's important to consider your relationship with the person and the context when choosing the appropriate greeting.