What if my friend is ditching me :( ?

Well, up until around November me and my friend (closer to my best) Would hang out after school and somtimes do things on the weekend . We havent done anything together outside of school since then though . She’s always making plans with me , but everytime she either cancels forgets or just doesnt want to do them . I’ve noticed that she always seems to find time to hang out with 2 of my other friends though . She’s always hanging out with one of them , at school , after school , going to movies , sleep overs , skiing . Ect . The other she doesnt hang out with much but it is still more then me . Im starting to feel like im just someone she talk to and laugh with but also complain about other people too . Almost like a doormat . Its not like we arent friends . We are , and we have been for awhile . But it’s just that lately she never wants to make plans with me . Almost like she’s pushing me away but not alll the way . Like shes making sure that she can still talk to me , complain , laugn and stuff but nothing more . So what should I do ? Its almost like she’s ditching me ! She has a few times actually . Its really annoying . I dont wanna talk to her about it but like I dont know what to do . I wanna hang out with sometimes . Shes always talkign about going camping with me and my family but that doesnt start until May sigh Any advice ? I feel like im being pushed out .