girls pls help me i dunno why a sudden change in her !!! pls dont hesistate to read?

she is my coll mate.we are both of different department .she looks beatiful and i wanted to talk with her . I couldnt talk with her in the college my coll wont allows boys girls to talk inside the campus .1day i saw her in the railway station and didnt knw wat to talk . but i went to her and said you are looking good in this dress.. after that . when ever i pass her in the coll she used to watch me whether i am seeing her or not .after a month her birthday came and i kept a greeting card inside a book and gave her .she returned it to me by sticiking a sticker over the card saying "thanks for wishing"not in a normal way but using colour pens and all..and then i gave her requst in face book she saw my request and sent me this message"i just want to make one thing very clear.. i am not at al interested in being ur friend or anything.. i never accepted ur greeting card.. i just thanked u for wishing.. dont try to give greetings and al like this hereafter.. i dont want to be rude. its better you understand." i said ok no problems thanks for not hurting me ..she is not accepting the frnd request in face book nor rejecting it .. In the college she sees me whether I am seeing her or not . if i see her she is starting to turn his attention some where after some months..

one day I said that i like her a lot and why do you keep ignoring me . atleast you can talk to me .. after seeing this mess on FB she replied . ok i can talk with you . but the problem is your friends tease me with you and all the stuff .. like that she said and started talking with me . and few days after she came to know that my friends know that she is talking with me and she suddenly stopped talking with me after that i some how made her to talk to me ... and this went on for months ... then i asked her for mobile number she didnt give .. for that i got angry and didnt talk with her and then after sometime i talked and got the number after months of struggle .. at first onli when i intiate the conv she will be talking to me and after few exchanges she will say good night .. and this wen for months and now she herself starts the conversation and talks with me for longer time and even if i say your fb dp is not good whereas others say its nice she changes the photo .. i dunno wat suddenly happened ... my question is is she getting my way ..ie she started to like me ??? if yes how you say so ?? pls help me .. i am damn confused ... wat should i do now ... whenever she text me i should reply immediately or should wait and reply to the text after hours so that she would get more crazier over me ???