How do you know if transfering really is a good decision?

<p>Okay, just bear with me on this one.
I am currently a sophomore. In Fall 2008, I was looking at different schools because at times, I just felt like my university of 3,000 undergrads that's 45 minutes from my home just wasn't giving me the opportunity, fun, and experience that I thought my friends were having. I lived at school and sometimes, I just felt like I was seeing the same people over and over again, doing the same things. In the beginning of 2009, my mom said that we couldn't afford our house anymore and that were were moving south. I asked her if she was absolutely positive, and she said yes, so I didn't put in my $250 housing deposit and was not allowed immediate housing for next year. I applied to a school in the south because I wanted to be where my family was. About a month later, my mom tells me that due to the economy, we are NOT moving. I was so mad! All I could think is that I'm not going to have housing for next semester. Then, surprisingly, I got my acceptance letter from George Mason University! I just stared at the letter for a while, because I'm not really sure what I want to do. I'm in such a rut. One day I'll be like okay I'm definitely staying at my current school, but then the next day, I just think of all the opportunity out there.
At my current school, I have a 3.6 cumulative GPA and know my way through and around my campus. Virginia is brand new territory, I've visited my aunt there about twice, and she lives 20 minutes from GMU, which I haven't seen yet. GMU wants to know my decision BY July 1st with the enrollment fee in a check of $250, then I can go to orientation to check out the school. Financially, we have no money, but GMU is only going to be about $2000 more than what I am paying for my current school - so financially, it's not a huge difference. GMU says says that they have housing for transfer students, and since I'm from New England, they can basically guarantee housing for me, where as at UNH, I'd have my name put on the bottom of a HUGE waitlist and have to harass Residential Life everyday to see if there's room for me, which it so cramped, I may be stuck with 3 other girls in one room. This past semester was fun, but I don't know if it's only because I "lived it up" since I wasn't sure if I was going back or not. GMU has 35,000 students and is right outside Washington DC, but I don't want to just be friends with my roommate and hope to bump into people along the way. I'm a pretty social person, but with such a large student body, will I just be considered a number? ALSO - my major, I'm in communication now, and I hate it, I was thinking about going into nutrition, which my school offers, but GMU doesn't. GMU certainly has a long list of majors, where as I might be able to figure out a better calling. I just don't know if GMU has what I'm looking for, if I'm really looking for anything at all.
If you're still reading, thank you, and if you can help me sort out my thoughts, it'd be appreciated. I've heard about the "sophomore slump", if you haven't, google it!
My friends and family just keeping telling me to do whatever makes me happy, but I just don't know what would make me happy. At times I think if I'm agonizing over transferring so much, then maybe I really don't want to. But then I think I am just being afraid of the unknown and I could really have a great experience in another state..and if the opportunity is there, then why not!</p>