How to reply when she says she's not ready for anything serious

She's not saying 'I don't like you.' She's saying the timing or her headspace doesn't match what you want right now. Sometimes this is true and sometimes it's a soft letdown, but either way, treating it like rejection makes you look like you weren't listening.

Pay attention to how she said it. Did she bring it up first or did you push for clarity? Did she seem apologetic or matter-of-fact? If she volunteered this, she might actually be trying to be fair to you. If you had to ask, she might be trying to avoid hurting you. Both versions mean she's setting a boundary, and respecting that boundary is what separates you from the guys she blocks.

First, acknowledge what she said without repeating it back like a parrot. Show that you understand the actual boundary she set, not just the words. Then, decide what you actually want and signal it cleanly. If casual doesn't work for you, say so in a way that's honest but not accusatory. If you're willing to keep things light and see where it goes, you can say that too, but only if you mean it.

Don't ask her to explain or justify. Don't make it about convincing her to change her mind. Just be clear about where you stand and leave room for her to engage or not.

Reply the same day or next morning while you're both still in the conversation. Waiting three days to seem unbothered just looks like you're sulking. Keep it short and don't add a lot of follow-up questions that force her to keep defending herself.

After you send it, don't text her first for at least two weeks. If she wants to hang out or talk more, she'll reach out. If she doesn't, you'll know where this is headed. Checking in too soon looks like you're trying to flip her decision. Give her space to miss you or to realize she actually meant it.