She asks lots of questions then goes quiet for days: what it means

A cluster of questions followed by silence is two signals, not one, and they point in different directions. The questions are what she does when she's engaged in the moment, probably on a free evening or between tasks. The silence is what happens when the conversation doesn't compete with anything else in her life. Her messages get sent when she has a gap, which means your replies are landing in gaps too, not in her main attention.

So look at the timing, not just the content. Did she send the questions in one burst late at night, or spread them across a few days? A burst suggests she was bored or curious for an hour. Spread-out messages suggest she's thinking about you, even if she isn't acting on it. Also check whether the silence follows something specific, like a busy week or a trip, or whether it came out of nowhere after a good exchange.

Each of her questions is an invitation, and how you answer decides whether she has a reason to come back. A reply that gives a real answer and then adds one small detail she can respond to gives her a thread. The detail doesn't need to be a question. A specific story, a firm opinion on one thing, or a small fact about your week all work, because they give her something to react to.

Don't answer with the bare minimum, and don't write a monologue. A short, specific answer that matches the energy of her question is usually enough. You want her to read your message and think she could add something, not feel she owes you a reply. Keep it about the topic she raised, not about the silence or how you feel about it.

After you've replied well, give it a real window before you send anything else. For most people in the early stages, two to three days is reasonable, longer if the conversation was clearly winding down on her end. Sending a second message within a few hours turns a quiet day into a pattern you're keeping up alone.

If she doesn't reply after that window, one short, low-pressure follow-up is fine. Make it lighter than your first reply and refer to something you actually discussed. If that also gets no answer, stop. Silence after two of your messages is her answer, even if she never says it. Keep the door open by not sending anything that asks her to explain herself, and move on without a dramatic final message.