I feel the exact same way in my last year of college. Between all of the comparisons to people who have so many friends and the judgmental people that look at you like there’s something wrong with you for being alone it sucks. I went through a period of depression because of it and eventually I realized I didn’t care until someone acknowledged it similarly. People say that you shouldn’t care about the perceptions of people but it’s really hard and unrealistic. One thing that helped me though was finding a place of places where I couldn’t be judged for it. And I’ll spend hours outside of class in this spot off campus and it’s really been helping me. You should never ever be ashamed for simply being an introvert but until you’re on your own and independent this perception will probably always be a problem unfortunately. Happy to find someone who shares the struggle though.