Should we even still be friends?

so im a girl and my bestfriend and me are really having issues. and i feel like were not even friends anymore forget about being bestfriends. we've been best friends since 8th grade and now its the summer before my senior year in highschool. The thing is though is that i transfered schools after my freshmen year and we havent been going to the same school for two years but weve always stayed close and talked on the phone, texted, hung out and stuff but we made other friends and hung out less and less as time went by which is understandable because we both have lives u know? but for other circumstances i was forced to come back to my old school where she goes to and i switched late in the school year. and i always thought like if i went back to the same school things would be the same with us. but thier not. i feel like ive changed. or grown up ...and she defineltly chnged. and i feel like ever since i came back she's been completely blowing me off alot which friends shouldnt do. and she always makes plans for us to hangout and she some how completly messes everything up and gets me in trouble with my parents when i come home late and thinks nothing is her fault. and she has a new bestfriend who is like her total puppy and listens to everything she says. but im not that kind of person and i want to be equal with my friends not play follow the leader. so anyway...we dont even have fun like we use to and we use to be like sisters always together but now she only thinks about her self honestly. so we got into a fight last night (just one of the many times where "nothing is her fault") when we went to a really big amusemnt park with our school. after the day was over i wanted to go home on the bus but her little puppy was begging me to stay with them and she was saying her sister was going to come and pick us up at 6 because my mom has been stressing on me lately about coming home late. her sister didnt come untill 9 and thats because she told her to. and she was like "oh sorry, its not my fault she didnt come, i dont controll my sister" and then i didnt even go on any rides and her and her little puppy ditched me for like 2 hrs when i just sat on a bench and talked on the phone when thier the ones who made me stay. i was really pissed because i know how much trouble i was in when i got home but she didnt even care. like at all. and i held in my anger and just shuted up about the whole thing but on the way back to her house she starts talking about how im a mood killer and how i ruined everything and how i shouldnt even come back to our school next yr if i dont want to then. so long story short i came home a 1 am when i was supposed to be home a 4 pm and got in heaps of trouble. and ofcourse its not her fault. so should we even be friends anymore?