Jealous friends........?

Ive got friends tered here and there not necessarily a tight circle and alot of them seem to get jelous of me whether its a new bf, job, clothing if i get my hair did etc its usually some snide lil comment and im jus thinkin..wtf? Im a humble person and never flash or brag about things EVER. Im not drop dead gorgeous. And im always willing to be a listening ear and shoulder to cry on. Would anyone have any ideas as to why this is frequent amoung my friends? Why me? Please help and thankyou in advance :) why this is frequent amoung my friends? Why me? Please help and thankyou in advance :)