I think you should fight for him .
Do your best to get him back . Make him realise that the china
gal is out for his money and not for life .
Although this may sound crazy but it`s the right thing to do
after all you guys were about to get married .
And even though many people may tell u that it`s not worth it
and all . But the fact IS THIS IS NOT THEIR LIFE and they
are not going through wat u are going through now so they wont know
how`s your feeling . SO the best thing they can do is give u
some advise that are usually morally correct . But such advise are
usually FAR FROM REALITY .
SO I SAY GO WITH YOUR HEART .
gd luck 
LOL go with your heart ...hahaha . Her boyfriend is seeing a
girl behind her back and the girl went off . The girl came back and
he resumed seeing her. That is a pattern of behaviour.
Let me give you a piece of advice sweetie :
Listen to your head, not your heart. Your heart can be broken
but it will mend in time. Your head can be broken but that's the
end of you.
