feeling left out, friends are being crap Options

[sweetest-emotion]

so i've been feeling left out with my friends lately. we usually hang out in this nice group of about 6-8 people, and its really a good time, but lately, i've toatlly been feeling left out. one of my friends, cristina, used to always go to me when she was having a problem, but now, my friends all look to lauren. lauren and i have had our differences, but it seems like cristina and sam (especially sam, she talks to her everyday on her phone) all talk to her, and tell me nothing. like when i ask how everything is, its a "good......where's lauren?" and so they leave and go find lauren. we're all friends, but i just don't feel like i'm a part of thier lives anymore. it's my senior year, and i don't want to pull away from them. help, please.