Im really really lonely

I am so unbearably lonely, for context I just graduated highschool in june and although highschool sucked I managed to be fairly connected to school and was really involved in theatre and band so I always had people to go talk to and was apart of a big friend group at a different school.. Now I'm in my first semester of uni and two of my friends have moved away, another two I barely see anymore and so I just have one friend I hang out with occasionally but he doesn't go to my school so its just on weekends. To get to the point I live at home with my and commute to uni (which I hate and wish I took a gap year so Im taking one class and transferring in sept) I have no friends in my classes and don't really talk to anyone and the profs have no idea who I am since I go to a school of 54,000 people, I feel like a little fish drowning in a big sea. To top it off I'm also single and all my friends are in relationships so that makes things worse hearing about their relationships all the time. I've also developed a panic disorder! Any advice on how to get out of this slump or just hearing peoples stories of how they are less lonely now would be good.