How long should you wait before telling a girl you like her?

Your interest is not the variable here. What matters is how she is treating the conversation. Look at who starts topics, how long her replies run, and whether she ever asks you something without you prompting it first. A woman who asks follow-up questions, remembers details from earlier, and keeps the thread going is showing you she wants more contact. A woman who answers every message with one line and never opens a new topic is telling you to slow down, or that she is not sure yet.

Also check whether the two of you have had a real conversation, meaning one that lasted more than a few exchanges and covered something personal. Texting about memes for a week gives you less to go on than a call where you both talked for an hour. If you have not had that, the feeling is usually better expressed by asking to meet than by naming it.

When you do say it, keep the shape simple. Name the thing you like, not a verdict on the whole relationship. Something that says you enjoy talking to her and want to see her again gives her a clear signal without asking for a commitment. The reply you want is one she can send in a sentence, whether that is yes, a laugh, or a question back.

The kind of message that fits this moment is warm and specific, and it ends without a hook that demands an answer right away. Avoid anything that reads as a formal announcement, and avoid anything that asks her to decide what the two of you are. Leave the question of where it goes open. If your draft includes the words "so what are we" or "do you feel the same," cut them.

Timing matters more than most people expect. Send it when you are both likely to be awake and not mid-scroll late at night, since a heartfelt message at 2am reads as a late-night impulse. Pick a time when you would be happy to keep chatting if she replies, not when you are sitting by the phone waiting.

Give her a day or two to respond before you read anything into it. If she replies warmly, match her energy and move toward plans. If she replies briefly or changes the subject, do not follow up with a second version of the same message. Let the next exchange be about something else, and see whether she brings your feelings back up. If the conversation never recovers and she goes quiet for more than a week, take that as an answer and stop pushing.