i know that it's not true that they would leave you forever because they found someone else, and not your fault - any of you - it's only because people always talk to other people... but i feel like that myself haha i feel i don't have much to offer. tho i don't really have friends now, i used to feel like that, i remember it very well, and with my girlfriend i can't even describe my thoughts when i saw her talking to new people at her school... and differently from when i was at school, i don't know if it's changed times or different place (because we don't live near each other, different states and a long distance relationship), the ones at her school would always ask for hugs, even call her 'my baby' (i cried when i heard that haha she said that guy called everyone like that, he was one of her older friends by the way)...
i know it's insecurity and anxiety, i feel like those friends should talk to us if they know we are like that, to make us feel good about ourselves, because sometimes they don't even notice you know? perhaps we should talk to them... as i talked to my girlfriend (very few times as she noticed it before and she herself would calm me down and say she was with me, she chose me and i should be happy - which i was and then i would just want to hold her forever)