sorry lilcam, but it looks like you're an idiot and you're getting used for all you're worth. actually, i know you are, there's really no logical pathway for her to be a loyal loving girl.
here's the deal on your girl. she's 19, she cheated on you last month, and she is/her family is poor. now think about what you mean to her. she cheated on you but stayed with you. i would bet that the guy she cheated on you with does not have the money you have OR isn't willing to GIVE HER the money that he has. to her, you are a financial tool. listen to me, NO GIRL cheats on a guy and wants to marry him soon after for love. she probably wanted you to find out she was cheating on you so she could see how you reacted. once she saw how loyal you are she decided that you're at least a multiple year investment and you wouldn't catch on to her lying self.
okay so that's my pessimistic argument. here's my optimistic one : she cheated on you but she still likes your money, which is cool because she loves you. but even though she loves you and you want to forgive her, the fact that her family will be leeching off of you does not change. THEY ALREADY DO. as much as you would like to help them and keep them from the damage they've done to themselves, they are only going to bring you down. look, this is where i'm coming from. i'm really smart and i know what i'm talking about. i really want to help you and guide you to success but (in all honesty) it's not worth my time. however if you want to call me and talk to me, PM me and i'll send you my phone number and we can talk about it.
here's another point. (i'm indo-beloved patriot so i am kind of familiar with the societal stuff) you don't like the asian traditional crap- but she's asking you to fall into it by marrying her when she's young. you live in america, you're american. she knows you don't like it and is still asking you to marry her. all i see from your description of her is how she's selfish and her parents are selfish. selfish enough to cheat on you, selfish enough to ask you to go traditional, she was raised in a selfish enough family that it would ask you for money, selfish to ask you to marry her. it's nice that you love her and you want to marry her, but i PROMISE YOU that there will be more girls you will fall in love with. you're a guy, you don't have to worry about getting married early. finish your masters, get a good job, and then get a really high quality chick with the paycheck you'll be bringing in.
i can't emphasise enough how bad of an idea it would be to even consider marrying this girl. there are hundreds of flags and alarms going off in my head telling me to tell you to dump this girl and move on with your life. i only touched a few of them and it's not worth my time to keep thinking about it. you're crazy for even staying with her so far. get out while you can.
if you love her : it's a nice though, but it would turn out to be horrible and haunt you. no.
if you're not sure : oh, hell no
if you dont love her : GET THE HELL OUT
oh and one last word of advice, if you don't listen to anything i said and you still want to marry this selfish immature (19 is immature, trust me. nobody should be seriously considering marriage that young, our cultures are f$#cked up) get a prenup or you will regret it. i promise that too.