You refer to yrself in such negative terms that I really think those feelings make you too vulnerable. Obviously she isn’t looking for the perfection of a model who excels at martial arts and wins chess tournaments. You seem very careful about problem areas like std’s or getting pregnant which do reflect a strange attitude on her part. Makes her sound desperate. Many have been taken advantage of for a green card, but those relationships can work as well. I guess she gets to be the lively impulsive one and you the sensible one. Continue to enjoy while protecting yrself.