In emotional new footage from reality show Keeping Up With The Kardashians, Khloe also reveals that she lied to cover up Lamar's infidelity and spent her special day on her own at home - sob!
In a preview of Sunday's episode (13 July), Khloe opens up to her sister Kourtney as she clears out the home she shared with basketball player Lamar.
Angry that Lamar is still wearing his wedding ring and telling people they are still "working things out", Khloe is keen to put her own side of events across.
She reveals: "Lamar is doing all this press because he is on a new team. But what he is saying is just not true. Saying that he talks to me everyday and that we are working things out."
Getting angrier, she blasts: "He's wearing his ring full time. F*** your ring, you were wearing it when you were f****** someone else too!"
She also admits that she was forced to "hide or conceal or cover up" Lamar's behaviour.
Turning to Kourtney, she says: "Let me tell you something. Last year on my birthday I lied to everyone.
"Because I had to lie and say I was with my husband. When in fact my husband was missing with another girl. Okay?
"And I lied and I gave up my Beyoncé tickets. That's how badly I was hiding. And I didn't have a birthday. I was alone and lied to everyone."
Khloe and Lamar married in 2009. She filed for divorce in December 2013 amid rumours that her estranged husband was cheating and involved with drugs.
Despite this heartbreak, and subsequently getting robbed, Khloe now seems stronger than ever and is dating rapper French Montana.
See the full episode of Keeping Up With The Kardashians on Sunday 13 July at 9pm on E!
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