Anyone else feel this way?

Okay, so I'm chronically ill and recently my health has gotten really bad, and because of that, I haven't had a single friend in YEARS. Like I'm talking the only notifications I get are texts from my mom and dad. Today I made friends with 2 very cool and very nice people, who seem very similar to me. We exchanged numbers, and everything else. I felt so good about it in the moment that I had made friends and then the deep set feeling of anxiety started to set in. Like my brain is just like "being alone is the better option for you" and other thoughts like that. I've honestly been alone for so long that I don't remember what genuine human connection feels like. I'm not sure if the sense of anxiety stems from being alone for so long or something else. I definitely don't want to be alone anymore and I wanna get out and do things, so why am I immediately terrified as soon as I do make a friend? I don't understand. Does anyone else feel like this??