So sorry that you are having a rough time. I remember my first few weeks of undergrad at the tender age of 18, and I hated it too. I was at a much smaller school, and still felt out of place. My mother has letters that I wrote home in those first few months and there was an interesting progression from mom I want to come home I hate it here to I cannot believe how great college is. Hang in there for a bit. Give yourself time to get adjusted. It's a huge transition, and one that no one prepares us for.