There are two things that are just not right:
1. You took a very big commitment move when the relationship foundation was not firm enough.
2. It is obvious that your girl (if I can call her that) does not feel at any point of commitment to you. Quite frankly, she is just not into you and your move to US is encroaching her space. You could have a talk with her for clearing the things up but don't expect much. You can't force an individual to fall in love with you.
You are thinking straight. Learn from it without losing your self-respect.