Formal:
* Maraming salamat, mahal kong kaibigan. (This is the most formal way to express gratitude to a friend)
Informal:
* Salamat, mahal kong kaibigan. (More casual, but still respectful)
* Salamat, friend! Mahal kita! (Very informal, expresses affection and gratitude)
More affectionate:
* Salamat, aking mahal na kaibigan. (Expresses deeper affection and gratitude)
Adding a personal touch:
You can also add a personal touch to your expression, for example:
* Maraming salamat sa lahat, aking kaibigan. Ikaw ang pinakamagandang kaibigan ko. (Thank you for everything, my friend. You are the best friend I could ask for.)
Choosing the right phrase:
Consider your relationship with your friend and the context of the situation when choosing the appropriate phrase.