So a lot of people think luffy was being overly stubborn when he decided to wait for sanji to return. He also decided to go on a strike and didn't force Nami to go away (cause it might be dangerous)
Now I think this is what makes luffy LUFFY. It all build down to trust... Isn't this similar to the situation they saved Robin from? She realized that she could actually depend on them and also for their help... Sanji has to learn to trust his nakama more and it will hopefully happen soon! By taking such drastic steps, luffy is showing sanji how much he trusts and believes in him!
Can't wait for the next chapter!!!!!