How to respond when she says she's been meaning to ask you something

She's not actually unsure what to ask. She's unsure how you'll react. The preamble is a safety test. It lets her gauge your openness before she puts something real on the line. She might be asking you to hang out one-on-one, asking where you see things going, or asking why you went quiet for a week. The specific question matters less than the fact that she's decided you're worth the risk of rejection.

This also means she's been thinking about it for a bit. That mention of "been meaning to" is literal. So your job is not to seem surprised or reluctant. You're confirming that you're the kind of person worth asking.

Your reply needs to do two moves. First, show that you're interested in what she wants to say. Not interested in winning or being right, but in hearing her out. Second, make it easy for her to actually ask. This means giving her space to explain without pressure, but also not leaving so much silence that she has to generate her own momentum again.

Don't ask "what" or demand she get to it. Don't make her feel like she's imposing. Instead, your tone should communicate that you're listening and you already think whatever she's about to say is worth your time. Keep it short. Matching her message length shows you respect the pacing she set.

Waiting hours or until tomorrow to reply suggests you're thinking about this strategically. She already went out on a limb by sending the first message. A prompt reply removes one source of her anxiety and shows you're present. Doesn't have to be instant, but same conversation window works.

If she doesn't follow up within a day or two, send one more short message that keeps the door open without pushing. After that, move on. She knows you're interested. If she needs more time to work up the courage, that's on her now.