Sorry for past relationship that you had to break up after 7 years but I think you deserve it. The mentality you are holding toward girls is just wrong as if you are some kind of saints who never lied. We all lie once in a while. It's not a big deal unless it's causing a serious damage to someone. Try to respect a girl as a person first then look for a girl. It's good for you and for your future wife. If you marry that girl with this kind of mentality then you will get never happy even after marriage. That is just recipe for divorce waiting to happen.
In this world you will rarely find a person who do things without a purpose. You said she desperately want to come to US. So what's the big deal? As long as she loves you then it looks fine to me and even better.