Man, confuseme, I hear what you're saying. Understand, there is no way you can know what is going on inside her head. If she chooses not to tell you, that's her choice. As long as you are not being intentionally dense (don't laugh, I've caught myself doing this), you can't expect to read her mind.
If my W said she needed "time," I, too, would interpret that as the ol' "time and space" statement. In other words, "time alone."
Some words of advice I often find myself chanting under my breath: 1. I will not participate in your being pissed-off at me. 2. Damned if I do, damned if I don't, so damned if I will.
and some recent suggestions from other board members about things to say to your SO: 1. "You won't tell me what's going on in your head, you won't tell me how you feel....you expect me to guess. You are willing to let me flounder away, THAT is not a very loving thing to do!" 2. "I am in need of some guidance on how to best show my love for you. I cannot read minds. If you choose not to help me out here, then you should expect to continue to feel unloved."