What do I respond to oh okay?

The same two words mean different things depending on the setup. If you asked her something and she gave a flat "oh okay" with no follow-up, she may be losing interest or she may just be busy. If you made a statement, shared something about yourself, or teased her a bit, "oh okay" can mean she didn't know how to respond to that move and is buying time. Look at the message right before hers. Was it easy to answer? Was it a bit of a challenge? Did it touch something she might be sensitive about, like a bad date or a preference she's protective of? Her reply is often shaped by what you handed her.

Also look at timing and whether she added anything. A quick "oh okay" in the middle of a lively back and forth is usually neutral. An "oh okay" that shows up twenty minutes after a long message, with nothing else attached, means something different. Neither one is a verdict. They tell you how much energy she has right now, which you can't fully see from your side of the screen.

Three kinds of reply fit here. The first is a light acknowledgment that moves forward without asking her to explain herself. It treats her answer as complete and lets the thread breathe. You can spot a draft like this because it has no question and no apology. The second is a small, specific question about something other than the point that stalled, so she has a low-effort topic to pick up. It changes the subject without making a big deal of changing it. The third is a playful note that lightly acknowledges the flatness without making it a thing. It lifts the tone. It works when it's brief and has no edge, so leave out any teasing that depends on her admitting she was being dry.

What all three leave out is a second explanation of your original message. Re-arguing your point tells her you think she misread you, and that puts her on the defensive. Keep the reply about what she does next, not about defending yourself.

Send your reply in a window you'd normally text in, not at some odd hour that makes it look like you've been staring at your phone. If she answers warmly, carry on as usual. If she doesn't reply at all, wait a day before doing anything. A dry "oh okay" is often followed by silence simply because the conversation ran out of steam, and a fresh message the next day, about something new and light, can restart it cleanly. Don't send a second message that refers back to the first.

If the follow-up gets no answer, or another flat reply, stop pushing on that thread. Leave it, and if you want to reconnect later, open with something unrelated and easy. Two unanswered attempts is enough information. Going past that is what makes the exchange feel like chasing, and it's the fastest way to turn a neutral moment into a rejection for both of you.