Help ladie troubles??? need help from females more?

ok theres this girl who i grew upp wit. she noes me backwards inside out and etc. and so do i. however wen we met we were young and immature so i didn;t have feelings for her like i do now. i've been to her house so many times its not funny. now im 15 and its been about 7 years now and i think im ready. so oneday i started to text her then we started textin buh however in the middle of the conversation she would not reply and i no it cant be her phone because in like 2 weeks after that i texted her again and she did the same thing. but i new she liked me atleast a little. our parents would be like were ganna get married cuz we argue alot but not serious, on like little things.. similar to how jimmy and cindy do in the show of jimmy neutron if u watched so yea does this mean she's playin hard to get or just doesn't feel the same anymore. why did she stop in the middle and i texted her baq about in like 2 weeks and she replied like nuttin happened. helP!!?? thnx