It's normal to feel insecure when you begin dating a girl who you believe to be out of your league. This is normal. However, it is a good thing to work on this insecurity. You don't want to become the jealous or insecure boyfriend. This can create a lack of trust in the relationship and things begin to tumble down. Work with your partner or talk with someone. Afterwards, find things that you can abide your time with and work with each other's schedule. Trust is a responsibility on you, and her actions are a reflection on her, just as yours are on you.