She stopped responding after we talked for a week

When someone engages for days then ghosts, the silence is louder than the conversation. It means interest isn't constant. That doesn't mean it never existed. It means something changed: the novelty wore off, other priorities came up, she got confused about what this was, or the conversation hit a wall where the next move requires meeting or commitment and she got cold.

Read the silence as a reset point, not a rejection. You two had a real week. Real people have reasons for disappearing. The question isn't whether she ever liked you. It's whether she's still there now.

Your reply should reference the week you had together without making it weird. Then ask or say something that gives her an easy way to re-engage. No apology. No 'I guess you're busy.' No tag questions that sound needy.

The move is to remind her who you are in one casual sentence, then pivot to something new that's either funny, interesting, or forward-moving. If she responds, you know the channel is open. If she doesn't, you stop. The whole point is to test, not to convince her.

If she hasn't messaged you in two or three days, it's fair to send one message. Not 'Hey, haven't heard from you' but something that works as a standalone message, not a follow-up. Send it in the morning or early afternoon, not late night.

After you send it, do not send another message for at least a week if she doesn't reply. If a week passes with no response, that's your answer. Move on. The worst thing you can do is hover around hoping for a message. It kills momentum and it kills your own time. One message resets the clock. Silence after that tells you everything.