hey @StarGazer, i'm so sorry you are feeling this way
i kinda knw what you mean about this, over the pandemic i felt very similar as all my friends dropped off and i was left with a silent phone most days. i also didn't have a relationship until my early 20s!
it did get better, a lot of years when i was a teenager i struggled to find people who shared similar interests with me, but as i got older this got better. i also used the internet a lot to find those people. i joined communities online around the things i enjoyyed and slowly developed friendships with the people most similar to me, that eventually expanded as i met their friends. it's not the same online as real life but it gave me a way to build up my confidence and at least have some people to talk to every day.
i also tried to explore hobbies and create things to release a lot of this emotion which i think was realy helpful! it probs helped me meet friends too because the right people liked what i did
i know it's not the same but i promise it does get better, sometimes we don't meet our best friends or the love of our live until we are older. everyones journey is so different.
you've got this!