As I've gotten older, my definition of family has changed to include not only my physical, immediate family, but friends, teachers, my siblings friends, among others. Thanks to the internet, I've been able to make friends from across the US and around the world who I consider part of my family. I may have never actually met any of these people, but the support they have shown me over the last year is something I'll never forget. Family isn't just what you're born into, it's the people that were there for you when you needed them.
College is the one time I've needed these people most. There have been many times when I've doubted my choices over the last year. These people have allowed me to talk to them and work out for myself what is going to be the best for me in the long run. I know I would have neve made it this far without my "family." College is a transition for everyone, and not always an easy one. Remember your family is only one phone call, email, or IM away. Your relationship with them will probably change, especially during your first year in college, but that's normal. Just remember that they will always be there for you and NEVER judge you.
So, tell your family how much you love them today. If your support team is anything like mine, you'll make it through that rough first year just fine.
Quote to live by: "Everything you say or do, I am always there for you, wheter you're laughing or you're screaming..." -Plain White T's Come Back to Me