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Bright discovered on last night's TOWIE that her on-off lover Arg had "done everything - first, second, third base with other girls".
Arg had denied rumours that he's played away, but Bright was left fuming when she took a phone call about the part-time wedding singer in last night's show.
In tears, Bright told her mum Debbie: "I literally feel sick. For four years how can someone be so deceitful? I'll never trust anybody again.
"I never want to meet another man. I'll be alone for the rest of my life."
She added: "I can't be near him, I think I would actually physically kill him."
TOWIE continues on Sunday night on ITV2.
> 'Only Way Is Essex' Lydia Bright: James Argent romance was killing me
> 'TOWIE' Lydia Bright removed James 'Arg' Argent from NTAS after fight
