I agree with everyone and especially Perna. Establishing boundaries online are very difficult. I think it would help if you understand you see this connection differently than she does. Let me explain - you happened to fall into this by accident and you started having some very 'real feelings' in this 'make believe' connection. Remember you're attracted to an online character that might not be anything like this IRL. It sounds like she was more experienced and did this as a hobby - she enjoys this flirtateous game playing with guys. To her this was a game but I think it was more for you.

Game playing is fine but I think you need to think if this is a good way to spend the majority of your time. You're young.....you should be in a real life relationship. It can be very confusing and risky to blend fantasy with reality - but remember online relationships can be very deceiving, therefore invest only a small part of yourself. Do you want to be sitting there playing games 5 years from now?