How do I let a guy know that I don’t want to talk to him anymore?

Last week, I gave a guy my number who I met while out in public. I wasn’t sure yet if I wanted to date him but he seemed kinda interesting so I wanted to try chatting with him to see if things could work out between us.

But I’ve already realized I have no interest in him. The conversations are very boring (only small talk, such as asking how my day is going) along with him showing red flags already. (Won’t give me an answer when I ask if he lives alone, has talked about his ex a lot.)

We’ve never talked on the phone, only texted, if that matters.

How do I let a guy know that I don’t want to talk to him anymore?
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