Should you message her if she's been dry texting lately?

One flat reply tells you almost nothing. A pattern of flat replies over several days tells you more. Look at what she is doing when she does reply. If she sends short answers but still occasionally starts a conversation, answers a question with a question, or mentions something from your last exchange, the thread is alive and she is just tired or distracted. If she only ever answers what you ask, never asks you anything back, and the gaps between her messages keep getting longer, she is pulling back, even if she is not doing it on purpose.

Also check the context. Has she said anything about a busy week, a trip, work pressure or family stuff? Dry replies often line up with life getting heavier, and that is different from a read on you. If you have no evidence either way, assume it is low energy and act like it. The goal is to find out which one you are dealing with, and the way to do that is to make one clean, easy move and watch what comes back.

When someone is giving you little, the most useful thing you can do is make the next reply cost her almost nothing. A specific, concrete question or a light observation about something she has said before works better than an open question like "how are you?" which asks her to produce a whole update. Something she can answer in two words still counts as a real answer, and it lets her re-enter the conversation without feeling she has to rebuild it.

Keep it short and lower the stakes. You are not trying to win the thread back or prove you are still interested. You are trying to give her an open door that she can walk through without having to decide anything. If the message would only make sense if she replied at length, cut it down until it doesn't need that.

Timing matters more here than the wording. If she has just replied, do not follow up within a few hours, even if you have a good thought. Give it at least a day, and longer if the replies have been getting shorter. Sending during her normal day, in the early evening or midday rather than late at night, makes it more likely the message arrives when she has a moment to answer.

If you send one message and get nothing back, leave it there for several days. A second message in the same week, unanswered, reads as pressure even when it is not meant that way. If she does reply, even briefly, respond in kind and do not make a big thing of it. If there is still nothing after a couple of weeks, the conversation has probably ended, and the honest move is to stop messaging and let it go rather than sending increasingly careful check-ins.