What can I tell her if I don’t agree with her and don’t want to talk to her so much anymore?

We’re friends but she’s going to visit a guy friend and stay with him for a week. she says she doesn’t like him at all but I think it’s a red flag and don’t like it at all. What can I tell her without hurting her if she goes then I don’t want to talk like that anymore but also don’t want to keep ignoring her. I don't know what to say…

What can I tell her if I don’t agree with her and don’t want to talk to her so much anymore?
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