How do you let your Filipina woman say yes to you in marriage?

I have been dating someone online. It first started with me signing up to this online dating site and came across her profile which was really attractive. She is from the Philippines, in a place called Cebu. She's actually very young; I'm fifteen years older than her. I have been dating her online for more than two years now. To those guys out there thinking these women from Philippines are only after foreign guys for money, let me tell you that in that span of years dating she never asked me money or material thing of any sort. Yes, those misconceptions on these fine young women are not all true. I am planning to go to the Philippines to meet her and hopefully get to marry her. The tricky part here is how to get an answer of "yes from a Filipina woman when you get to ask her that big question?