Killas right you have to make that decision on your own if your happy with Dawn then stick with her but if your finding the seperation hard and you feel that you'd be happier with Jessica then that's the way it gonna have to be.

If you do choose to break up with Dawn then the only advice I could give you is to be totaly honest and tell her that you dont feel that that you are seeing enough of each other and that you've met someone else that you really like and just try and be as gentle as you possibly can with her about it.

But then it's all down to you on that. It's your decision.