I used to love talking to people and meeting them, but during early middle school -last summer grade I had social anxiety (on and off) because of a lot of issues, like death, overthinking, not being able to relate to anyone and a lot of other stuff.
There's a quote Anne Frank once said in one of her entries I think it goes like this: Deep down, the young are lonelier than the old. Social Anxiet can get crippling and I still get it every now and then, but no matter how much I socialize, it only goes away temporarily and comes back, it's really a nuisance and I'm sure one day we're all gonna make it, man.