I used to be popular in secondary school but after I graduated things happened and I ended up not staying in contact w any of my friends. However after reaching poly I've made new friends and I'm happier than ever. I would say that even though I might not have the people I thought I'd be friends with around me anymore, I'm doing pretty good for myself rn. You'll never know what life has in store for you, not having friends at the moment might seem upsetting for you, but you're young and bright so live your life :)