I'm so lonely

I haven't talked to anyone outside of my family in months, and even before that every time I would talk to someone I'd be on the verge of a panic attack and would fall apart as soon as I would get in my car to leave. My therapist went on maternity leave, and I can't bring myself to send the emails and make the phone calls to find another one. Not that therapy was helping anyways, I didn't even go half the time. I've spent all day trying to text my friends, if I can even call them that, but when I try to hit send I just can't. How do people interact with each other? I just can't do it