ptw.
wat icepole and tan_willian said SO MUCH to u r quite true
!!!
The fact :
1)she is cute but
unfaithful,lied,betrayed, do not care about your feeling, look for
present happiness(not for future),changed of heart, dont appreciate
u and what u have done for she. 
2)another gal friend who is not as cute, willing to wait for u,
caring for u, understanding, maybe better for u , appreciate u,
feel happy and sad for u and with u 
In your mind & heart (emotion)
felt betrayed, angry, hurt, pain, put effort, heart,time, $$ wasted
on her
but.....
u still miss her, miss happy memories with her, want to
know how she's doing, cannot forget her, cannot let go of the past,
cannot accept the
well, that's human...... u just
bring the facts and personnal emotion together, compare which is
the best/wise choice to choose. u choose your path to walk
man..!!!
although i also been through the same boat as u , my point of view
is quite difference from others, i will not forget of all the happy
memories my ex and i had together, because i know if i forget them
all, i will have nothing. i know there will be no one going into my
life again... that why i 'zhen xi' the happy memories, at least i
have some happiness memories in rest of my life
