should i just accept the nocontact

I've been talking with this girl for a few months now I liked her a lot and one night i confessed that (I was encouraged because I heard from her friends that she liked me too). She said some things like, I don’t like relationships because they end with losing that person because of problems. She also said she didn't want to lose me. I accepted her opinion and we remained "friends," continuing to talk almost every day.She was giving me mixed signals that She's interested in me, but lately she hasn't been talking much. Leaving my messages on delivered for 10 hours (I know she was ignoring them because I see her reposting videos on TikTok), she leave in the middle of the conversation and comes back after 5 hours as if nothing happened.I spoke with her a lot about this, and she always said that she "doesn't use her phone much and sleeps a lot." After much thought, I realized that I was wasting my energy on someone who didn't deserve it. I didn't say goodbye or anything, I just didn't text her and she didn't text me either. Three days passed without any messages. The question is, should I message her? Or should I just walk away?