ok so you're 14.
i had a similar experience happen to me when i was 14
so early highschool i was some beta cigarette who didnt date until highschool so when i got my first gf i slowly grew attached to her and we dated for like half a year, which was cool and all, exploring ladies and whatnot but one day she just acted differently and we ended up breaking up pretty much on the same basis as you "I just dont like you that way anymore"
what i did to combat this was simply move on. I mean sure you can stay friends and such, and it's going to suck for a while. That's a given, but you're young mang, it's not like she was the only one you could have. and there's plenty of chicks down the road who will Annoying Orange each other in succession (dont ever downgrade, thats just forgeted). add one to the gf belt and look into improving yourself for the next girl.
hope this helps