When is it time to cut off an friends with benefits?

This is an updated question to my last one my friend who has an friends with benefits he’s acting very cold towards her and he keeps leaving her on read and doesn’t respond not only that she called him by accident and he called her back and goes I’ll call u back and never called her back lol and whatever she messaged him he never responded and left her on read I’m telling her to just leave it block him if not then leave him on read too if he miraculously messaged her and just don’t see him again he said he likes her I don't know what kind of like this is but what would some of you do in a situation like this?

When is it time to cut off an friends with benefits?
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