Lucid dreaming is the phenomenon of being aware within dreams, which allows you to take control of the dream's aspects if you so choose. This also gives you access to your waking-life memories and reasoning, meaning you can create goals in waking life and try to remember to do them in the lucid dream.

That was a great story, the balcony story, and the thing about going to West Virginia is very cool, but I'd be willing to say it's just coincidence, and that you shouldn't go along with your roommate. Follow their updates when they get there though, so you'll know if something is going on that you might be able to link to the dream.
If there are more "signs" pointing toward going to West Virginia with them, I'd say give it serious consideration; however, I would be very hesitant to act on a dream's signs, as dreams tend to be very....abstract and different, and taking everything that coincides with real life as a sign would be more than dangerous. Keep a skeptical lens on when looking at the links.