Should I stay on spring break even though I hate it?

I’ll have to start with the back story before I ask the actual question:

I’m on spring break with one of my sorority sisters and a bunch of her friends from high school. I wanted me and my sister to be better friends after this because she’s probably my best friend in the sorority. I got other offers with my other sisters but I chose this one.

So we have a house with 11 other people and I’m miserable. The other girls here are already best friends and they talk about people from their home town and I can’t contribute to the conversation because I don’t know who they’re talking about so I feel left out. And most of the people here are dating each other so they stick with their boyfriends all the time. My sorority sister does that especially. She told me before we left that everyone would be so nice and accepting and that she would hang out with me, but neither of these happened. She is ALWAYS with her boyfriend (who isn’t in college so they don’t see each other often) and never talks to me.

She’s sleeping with her boyfriend downstairs and I’m in the room upstairs with all the girls stuff but they usually sleep with their boyfriends so it’s just me. But my room is the only one that connects to the upstairs deck and it’s so annoying. I go to sleep early because I don’t like it when they just sit downstairs in each others laps and play beer pong but last night especially, they kept walking in out of my room where I was sleeping, my sister even told them to! And then this morning, they woke me up to go smoke on the deck, paying no attention to the sleeping me or anything.

I don’t have my car here, I rode down with my sister, so I can’t just leave whenever, but I do have some friends from my high school staying about 30 minutes away who are leaving on Thursday and Friday, and I could ride with them, but there’s a band I want to see playing Friday night.

The question is, should I talk to my sister about how I’m having the worst time ever? Is it worth staying?