I feel like no one likes me?

Well im in 7th grade and i was new last year and i was kind of popular.. but this year is different. last year everyone invited me places and everyone would talk to me and no one would ignore me or anything but this year its different. No one asks to hang anymore.. no one talks to me anymore and im always at home bored. I dont know if it was something that i did but everyone has someone they always hang with.sarah has mady and lindsey. kayla told me she doesnt want to be my friend anymore (but idk why) and so now all her friends dont like me. erica has about everyone else i can think of. elizabeth has tori. and carissa and zoe have eachother... and i have no one. WHY IS THIS HAPPENING TO ME?!