check into it, Tina. Sometimes they really are there, you just have to dig to find them! On the flip side, check out some churches that are close to your campus. Most of them will have some of the students from your university there and it's a great way to meet new friends while growing in your faith!
For groups on campus, look for InterVarsity Christian Fellowship (IVCF), Campus Crusade for Christ (CCC), Navigators, Young Life, Baptist Student Union, Fellowship of Christian Athletes (if you've ever played sports), etc.
I felt the same way as you my freshman year. I went to a super small high school. We had the largest graduating class in history, and still hold the record at 32. My first class in college was twice the size of my entire high school. It was quite a culture shock. I knew my roommate when I moved it...or at least I thought I did. She was a sophomore, which meant for me to live with her, I had to live in the upper-class dorm. Everyone already knew each other and were much more interesting in going out and getting drunk than wanting to be friends with a lowly freshman. (I learned soon enough this wasn't the attitude of all upperclassmen, just a select few) My roommate ended up moving out just after Christmas. I was glad that she was moving out (I could give you some roommate horror stories from living with her!), but at the same time, I was so depressed that I was going to be living alone...and at that point, I still had not made very many friends. After spending several nights alone in my room, crying myself to sleep, missing home, my old school, all of my friends, it finally hit me that I WASN'T alone. Even when it seemed like everyone was gone and I had no one, God was still there, waiting for me to turn to Him and let Him be the best friend that I was longing for. It was a real turning point for me. About 3 weeks into the spring semester, I got involved in InterVarsity and made some WONDERFUL, lifelong friends. I still talk to these guys on a regular basis and we are scattered all over the country (and world!) today. Just hang in there and don't give up. Email your old friends...keep the lines of communication open. I still talk to and see my old high school friends quite often because we have all kept in touch through email and IM...granted, when we get together, it is usually some sort of celebration (wedding, birth of a baby, someone is moving, etc), but it doesn't matter to us what the reason is, as long as we can spend some time with each other and catch up on what has been going on in each other's lives since the last time we saw each other.
Give it some time, and get involved in some things...you will meet friends, I promise! And don't forget that you are in an awesome mission field and have an amazing opportunity to witness to those around you!