My best friend doesn't wanna be friends in college

So basically my best friend has another best friend and CONSTANTLY she says things like "me and her are gonna travel to college/share a room/do everything together!" And it just makes me upset because all 3 of us plan on going to the same college and I don't get why she needs to constantly say things like this and when I mentioned it she was like "oh you'll make friends probs idk"