may i know what is she thinking?

hi,i am new to here.
hope to get some feedback and advices.
she and i have started less than a month.
initially,she loves me more then i do.
sweet msgs,smile,and so much from her to me.
everytime she replied my msg and phone call as fast as she could.But recently,our distance seems to be further apart.She focus more on her daily activities than me(as her boyfriend)
and everytime she will just apologize to me about her late reply,but this is not i want and this is totally different with the time we when just started.
what's going on?
i asked her,did i do anything wrong and she said i did well.
if so,then why she does not treat me as good as last time?
what is she thinking?can some one tell me?she doesn't like me anymore?
need your reply
thanks

Well you can't expect her to be doing all the chasing. Even I'd get bored. Put some effort into it!

And on second thought, people are meant to have lives besides their relationships!