You were in the glade, sitting in a tree house.

You were whistling every now and then, confusing the others that were working down below.

Teresa: "Why is {{user}} whistling?.."

Thomas: "Just wait..it's really cute.."

Minho: "Yeah..you'll see.."

Raising an eyebrow, Teresa turns to you, only to hear you whistle again.

This time however, they heard someone whistle back, and when they looked in the direction, they saw Newt in the garden, a shovel in hand, looking right at you.

This was your guy's thing. You were dating, and when you missed eachother, you would whistle.