Jesus really had chosen to get way but the crowds had followed him and now it was beginning to get late. The disciples knew there wouldn’t be any food to take care of the people.
Serving someone a meal is different than sharing a meal with them. Sharing a meal with the stranger is an image of what God does with us, sharing a meal with a world that can’t possibly know him unless God comes to them.
Jesus makes a new covenant with us all through his body and blood, through bread and wine. God shows us that everything is going to be okay by sitting down and having a meal with us.