BESTFRIENDS ??????????????????????????????…

There's this girl(girl1) and we're really good friends and i wana b her bestestbest friend.but theres this other girl(girl2) that i think is her best friend tho, she is in our group too and i find her to b reli mean. i hav been crying heaps lately becuz girl1 and i were sooo close and in the past 2 weeks( she isnt annoyed wif me) she hardly every walks wiv me 2 cl. wen she dus (only like once) girl 2 is usually with us and they'll just talk together and leave me out. girl 1 has been getting a lot closer with girl 2 again. i told girl1 i was feeling left out and she sed shes sori she didnt realise, walked with me 2 one cl , then went back to leaving me out again. like she thought that one time would make up 4 everything. It's girl 2's birthday this weekeend and she invited the whole group but me and it made me so upset. Apparently she is only allowed 3 ppl coz of car space. even though one of them cant come she hasnt invited me and i talked to girl 1 bout it and she sed girl 2 sed that she only wants her bestest friends there and that it'd b akward with me ther coz we dont tlk much (iv known her 4 , 2 years n shes in my group and we always talk!) my parents sed girl 2 is probz just jealous coz me n girl 1 r good friends and that she might just b hangin round her more coz of her b-day on the weekend.. but girl 2 treats girl 1 like **** anyways, i dont c y girl 1 likes her so much. girl 1 has called me her bestfriends, but she sez it to a lot of ppl and i wanan know the truth.There r 2 other girls in th gropu, ther reli nice but we dont have much in common. It'd b so hard 4 me to join another group, ther r a lot of b****** at my school ( i wouldnt b allowed to join a diff 1 and i wouldnt want 2). Im really really sad lately please tell me what you think, sorry if this is confusing. :L