I agree with se7en.
Also I would keep her for two reasons.
1. Her value will only grow as she grows. I don't know what you paid but as a breeding size (or almost) female her price would be higher. Yes that's two years of time and food but that leads to reason 2.
2. Two years is a long time..but. .You may run across a male for her that you would like better than the combo your humble bee would have made with her if she could have bred. If by two years you don't find anything you want to breed to her, there's reason one.