I need help with my friends... what do I do?

Two of my friends have been really close for quite some time now, but they're starting to leave everybody out. they never invite me or my other friends to do anything and sometimes completely ignore us. they act like everything is perfect and have become infatuated with each other and dont care about anyone else. They used to be my bestfriends but they dont even talk to me half the time. and when a new girl came to school they became "besties" with her and have ignored me even more. Plus their new friend flirts with my ex al;l the time and helps start visous rumors and things. And then I have two other friends who have gotten super religios. I can't even talk to them without them telling me I'm going to hell or what they believe or that I neeed to believe exactly what they do. I mean I'm glad they have faith but that isn't fair to me. I just dont know what to do and feel like I'm loosing everything important. I have no one to hang out with anymore really. or even talk to.