Why is this girl not interested in me? Girls help?!?

Well I liek this American Girl and I am Russian anway I really like her we take pics smile call me handsome and cute all the time and everytime i have food she takes it and eats it and dont relaize i dont say anything shes not fat shes quite nice looking a Christan girl anyway I Russian Orthodox but like I known her for quite some time and Im not ugly I Dj I workout Im traing in MMA with my Russian Friend we fight hit each other everything boy and anyway I'm Kind nice sweet mature respectful StrongFaith Peaceful I dont laugh much at all or smile I always have a stright face i may give a smile here in there and they say its soo cute anyway I never been Kissed had a GF i'm 18 about to be 19 grauding from high school soon never had a valintine anyway! I got her number I said hi no text back wait a day I saw her at the mall her mom said that boy is shrap looking and she went mhm and it was weird she smiled at me and everything but like I texted her few hours latter and said she looked cute at the mall no text now its today US 2:40PM 5/9/11 and I asked What traits and exspectains is she looking for in a man and nothing never texts back and I think its because shes kinda taller then me but I dont let my shortness stop me at all!