If you look at OP's name, I think she's female, which adds another layer of complication to the proposal. Her girlfriend might not be fully "out" with all of her family members, so explaining she's marrying another woman might not be something she's ready to do yet. Also, I've heard that an issue that's arisen in states that have recently legalized gay marriages is that some couples now feel obligated to get married now that they can, whereas before marriage was never an available option so they never had to give it much thought. So OP could be one of those people rushing into marriage - who knows? I definitely don't think we have enough info here to call the girlfriend a bitch though.

I agree, you can't judge her morality based on one action. Maybe she's having a hard time making a decision, and she needs time. If I hadn't already been talking about marriage, or ready for it, the question would throw me off, as well.

I agree with the not judging bit, but the girlfriend should have at least had the decency to ask for some time to think about it.

She didn't decline or accept. That is the problem

I agree that this is more complicated due to the newly legalized gay marriages, the fact that it is still taboo for many families, etc. However, the girlfriend owes Op and answer, or at least ask for some time. A healthy relationship is built on trust and communication. Op should consider why she is asking and then talk to the girlfriend about why she proposed and if the girlfriend is ready. Marriage is a big commitment and some people don't ever want to get married.