No worries I mean if it was a friend I would figure she just still wants to be your friend and make sure you guys are cool? But if it were me I would literally say that “hey I get that you’re not interested and I respect your feelings but I hope we can still be friends and talk sometimes”. Not just say “hello” every single day. Do you guys work together or have to see each other on a regular basis? If not there’s no harm in trying to get the point across more clearly, especially if you don’t want to text her anymore at all. Plus she can move on, hopefully. She probably is clinging onto hope when you said you don’t want any relationship rn. Like maybe she thinks she can change your mind. If you hadn’t said that my next suggestion would be to tell her you’re dating someone else.