she's my past!

Eventhough we break since 2 months ago, she still owns some part of my mind... yeah, i'm still miss her..but not too much anymore..
she's my past...
it's a funny thing to say that God sent her to punish me for being a heartbreaker last time... yeah, i do believe in something like 'karma' stuffs... well, guys..frankly, she was the one that started to come to me in the beggining...and i planned to spend time with her since i'm own to no one yet...
and i just accept her... needless to say, she spends lots of her time sms me..and i do reply every single sms she sent....
originally she was using 017 number. she change to the same mobile operator that i'm using after 2 weeks we met...
how i met her? she's a fren of my buddy's ex...back then they were still together....
things were normal for the first month. we only date for 1 time only...
don't ask my what we were doing for the whole first month...she's a secondary student and i'm a college boy....we don't have much chance to meet..
Even the day of our 1st and only date i had to skip my lectures. It was our first month anniverssary...
we did lots of things together... hanging out in sg wang and times square...and my first 'ecounter' to roller skate...it was embarrassing actually... i never skate for my whole life before... but, it was really fun...
she were busy with her cellphone that day too. she kept sending sms with somebody...
it's my concience to get jealous when my gf keeping sending texts with other ppl while she's besides me....
and i could only say that maybe it was a guy... i'll leave this part for you guys to imagine...
two weeks after the date, things just going not right..
she din't reply my sms... she din't pick up my calls... i tried all sorts of way to contact her but in the end, she's missing in a silence...i asked her bestfriend (my buddy's ex) whether she knows anything.. she told me that they were having an exam for 2 weeks and maybe her phone were kept by her brother...and i gotta believe in it since there were no other explanation that could explain her sudden dissappearance.

2 weeks later, i try to contact her again.. but,it was no change at all.. i ask her bestfriend again...
i was told that she were acting different. she issolated herself frm all her school mates.. i worried about her. anything could happened on her for making her act in those way...

About 1 week later, i saw her online in msn. i sent some message to her... but i get no reply at all... did i do something wrong? how could this relationship just ended in this way?
After i tried and tried to get to her for many times, i finally gave up.. actually i understand what it meant. she dumped me and the worst is that she actually cheated on me.