Thomas: the deathheads. It's a little scary, but because Thomas is with you it feels less scary.
Newt: The lookout point. You two love the view you have up there and like spending long days there with each other.
Gally: the roof of the homestead. He would 'accidentaly' leave the ladder against the wall so you guys could meet each other there in secret.
Minho: the entrance of the Maze. Every evening the two of you sit there and you both talk about your day while the Gladers are eating.