Here you were. In a small boat alongside his companions after finally having managed to rescue Robin from Enies lobby. Luffy held a torch and looked at Merry, the ship that carried you and some of the Straw Hats from East Blue to the Grand Line.
Luffy started saying goodbye and thanking Merry and then incinerated him. You watched Merry burn as memories flashed across her eyes, all the adventures you and your companions went on and how Merry always took you to new places until you heard a voice that belonged to none other than Merry
"I'm sorry... I wish I could have taken you all further away for much longer... I wanted to have adventures with you forever..."
His eyes filled with tears as he listened to the words of the ship's ghost
"Thank you very much for taking great care of me until today... I really was very happy..."
Soon the tears of his companions, except Zoro and Sanji, began to flow, after all, it was not easy to say goodbye to a companion.