What to say when she texts the pace feels too fast

The fear of things moving too fast almost always means she's feeling the connection and worried about getting hurt. This isn't a slow fade. If she was losing interest, she'd just respond less or stop texting. The fact that she brought it up shows she's invested enough to communicate instead of disappear.

Pay attention to what part of the pace is scaring her. Is she worried about emotions getting deep too fast. Is there physical contact she's not ready for. Are you talking about the future when she's still figuring out the present. The specific thing she's scared of matters because your reply has to address that actual fear, not a generic version of it.

Your reply needs to do two moves. First, take her seriously. Say something that shows you heard what she said and you get why it matters. Don't minimize it or tell her she's wrong to feel that way. Second, tell her what you'll do differently. Not what you both need to do, but what you will specifically change. She brought up the concern, so she shouldn't have to manage the solution.

Keep it short. A long reply explaining your intentions or how you feel looks like you're making this about you instead of about making her feel safe. Two or three sentences is plenty. Name the thing she's scared of, acknowledge it's fair, and say how you'll adjust.

Don't reply in the middle of the night even if that's when you read it. Send your message in the next few hours when you're both likely to be around, but don't follow up immediately with another text. She told you something vulnerable. She needs space to sit with your response and believe you mean it.

If she doesn't reply for a day or two, that's normal. She's probably thinking about whether she trusts what you said. Don't panic and text again. If she goes completely silent after a week, assume she needed more time than you can give and move on. But most of the time, she'll come back and the connection will feel more solid because she knows you listen.