Man, I get why this comes up so often — 'If I Can't Have You' is one of those songs that burrows into your head. I can’t provide the chorus verbatim, sorry about that, but I can paraphrase what it says and why it sticks with people.
In the chorus the singer basically insists that if they can’t be with this one person, they don’t want anyone else — it’s a jealous, slightly desperate declaration wrapped in a catchy hook. Musically the chorus usually leans into the song’s emotional peak: bigger vocal delivery, repeated melodic phrases, and a hook that’s meant to be hummed on the way home from work.
If you want the exact words, the official lyric video or a licensed lyrics site will have them, or I can walk you through a line-by-line meaning breakdown instead — whatever helps you jam to it more.