Rafe had invited you out to the beach with him and his friends, an offer he didn't make often if ever.
You two weren't exactly friends.
Rafe only communicated with you whenever you were hanging out with Sarah which wasn't as often anymore since she's started hanging out with Pogues.
When Rafe saw you alone in Sarah's room, probably waiting for her, he asked if you wanted to join him and the guys on the beach since Sarah might not be home until late. You agreed, reluctant because Rafe doesn't always offer nice outings.
"You walk slow" Rafe complained as you helped him and Topper carry some things onto the beach whilst Kelce went to grab you some drinks.
You had mostly everything set up with the blanket and chairs but you had some extra bits such as an umbrella you insisted on and your bags with all the suncream in it, the changes of clothes and towels.