How to cut off a friendship in a nice way?

I have a couple friends who just don’t care about me that much and they’ve shown it in their actions. I don’t want to spend any further time with them but they text me often to hang out. What’s the best way to respond?

Other people I’ve asked have said to just deflect and they’ll eventually stop asking. I don’t feel like ghosting is nice. I know I could be straight up with them but I guess I feel guilty for not voicing my feelings sooner. What do you recommend?