My girlfriend says that she feels she needs alone time once in a while, and I don't know if I just didn't understand at the time, but I've talked to her, and as I understand it, it just sounds like she wants time to herself, without having a specific reason (e.g. "I have to get [x] done"; "I want to work on [y] project"). Anyway, I'm not yet sure how to react to it, since things are normal/great when we're together, but I just dont like the feeling that I have to restrict myself in some way (which can make me feel nervous around her or distant from her). Any comments?