Thank you all for your responses.
I didn't sleep well last night. She texted me at exactly 3am (2am Bangkok time; that's when they end work for the day) the night before. "Darling, I miss you so much!" was the message content.
All of you are absolutely right about the need to be big-hearted. I'm sure she's had an ugly past (they all seem to, anyway) and I need to be able to see past that if I want this to go anywhere. But the reason why I haven't been sleeping well is precisely because of that - I don't think I can. Not at this moment anyway.
Yesterday night I found out there is a real possibility that the "Australian-Chinese" guy in her life before me is on this board, reading this right now. We're all brothers so I can't bear any grudges, but it still hurts nonetheless. She's not told me much about him, but instinct tells me that he's that guy.
To him I say this - congratulations for scoring. She's a nice girl.
Now I'm just trying to look past this and forgive her past. But it's not going to be easy. I foresee an argument the next time we speak on MSN.