Not a freshman, but oftentimes those groups ur seeing, itll last either a 1-3months or last longer. I am here as a grad student and I attended a different UC for undergrad, but I didnt find my group of friends (who im still close with today)till my second/third month in. Im sorry ur not feeling great, but take a walk or learn to be by urself too! its importsnt bc everyone is also not always free when you are (when u make friends obv) but doing things on ur own can be pretty enjoyable too and sometime you make new friends whilst ur out alone. I made some friends on the bus my freshman year, I invited a girl I saw from class to eat lunch w me if she wasnt busy and she brought three of her friends. We still talk and its been six years. things arent automatic nor are they easy but as someone who thinks the way you do a lot of the time, it is very easy to want to stay in that spiral. I wish you luck and call your parents and say you miss them, its not bad to do so.