It really is fresh right now. Don't expect it not to still hurt. Grief has stages, and making friends will speed that process up. Get out of your dorm and make an effort to do things on campus. There really are non- Greeks and non-Greek activities all around you if you don't focus on what you don't have. I know it's hard, but you're going to make yourself miserable and ruin what is arguably some of the most fun times in your life if you don't snap yourself out of your funk and enjoy college. Start with people in your classes and dorm. Ask someone to lunch. Go to a meeting of a campus group. Look at the message boards on campus. The opportunities are there. This will also improve your experience, your resume...and you may even like it.
Last, try to laugh. It is a natural stress reliever and heals. BTW, UGA is an awesome university. You'll find your place.