LOVE RAT BILLY'S SUICIDE HORROR

Tried to off himself TWICE after cheating with best pal's wife

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Piano Man Billy Joel says he was torn by guilt over what he'd done to his friend

RACKED with guilt and emotional pain for cheating with his best friend's wife, desperate Billy Joel tried to end his agony twice in near-deadly suicide attempts.

That's the bombshell revelation about the 76-year-old Piano Man singer, now wed to fourth wife Alexis Roderick, 43, in the documentary Billy Joel: And So It Goes — which recalls his anguish and attempt to end it all over destroying the marriage of his best pal Jon Small.

Billy and first wife Elizabeth, who was previously wed to Small