Girls, please tell me what she truly means!?

The fact that she Just blurted out "okay" shows that she is definitely interested in you. But when she says her life is complicated that basically means that she has a boyfriend that she is at odds with at the moment. I would say that she is thinking about leaving him for you but she doesn't know yet if she really wants to. You can call her if you want to but when you do make sure you don't pressure her any further about the situation. Just keep hanging out with her and letting her know that you're interested in her. She will eventually make up her mind and let you know.