Forever and always

"Hey, you guys ready?" Casey asks.
"Just about," says Lexi, Casey's roommate.
"Packing some snacks for the room," says Jessica, her lab partner .
"Yep, all ready! I'm gonna haul a cab for us," said Piper one of her best friends from school. Piper and Casey met when Piper needed a math tutor and Casey volunteered to help her.
"Ok we'll come down in a sec," I tell her
We came down stairs to see Piper holding a cab door opened for us.
We stuff all of the luggage in and tell the driver to drop us off on W13th street off the highway.
"Shit" I mumble under my breath so only Lexi, who was sitting next to me can hear.
"What's wrong Case?
I have hiccups and don't have water. Do u have any?"
"Nah sorry," they all say in unison.
"Well I will need to buy one when I get to the pier waiting for the boat," I said.
I'm not trying to get into your business, but where are you going?
"We are going on a 7 night cruise," I say.