She is
trying to protect herself.
She knows that eventually this relationship will have to be
separated with either a break or a LDR, which is likely as well,
she is not confident at all in. Rather than to go through a
emotional turmoil in the future, she opt for the 'safer' choice
now, which is to leave before she sinks any further.
On the other hand, is she also trying to protect you as well, with
the above points.
Direction of relationship is different: One who is realistic and
practical against one who is chen jing yong you. You may want to
salvage your love, but you could be trying to eat with one
chopstick or clap with a hand - futile.
P.S: I will not advice LDR unless BOTH parties wants to challenge
their relationship and be prepared to put in twice the effort
unlike other usual relationship and the length of stay is not
longer than 2 years maximum. What she is doing MAY NOT be a bad
thing afterall- the main thing is what you want and how your
preception sees things. 
Cheers
