Brandi Glanville will be seen opening up about her ex-husband Eddie Cibrian's affair with LeAnn Rimes on tonight's new episode of Famously Single.

As she attempts to get to the bottom of her ongoing relationship issues, the former Real Housewives of Beverly Hills star sits down with a therapist and re-lives Cibrian's highly publicized affair with the country star.

“I trusted him completely and fully,” Glanville explains to Dr. Darcy Sterling in a sneak peek at tonight's new episode of Famously Single, via Us Weekly. “Then I went to visit him on a movie set and for the first time, I felt like something was going on with the person that he was acting with. He told me I was crazy. That morning, I get a call from a bitchy mom that I’m not really friends with and she’s like, ‘Have you seen the cover of Us Weekly?’”

“I go to the store, get the magazine — panic attack, crying. It was on Access Hollywood, Extra. It’s on every cover of every magazine. It’s there. It’s real. I lay on my closet floor and just sobbed,” she recalled.

Although Glanville was understandably devastated by her then-husband's affair, which resulted in Cibrian marrying Rimes two years later, she now understands that Cibrian's infidelity wasn't her fault.

“It wasn’t about me,” she said. “You buck on, so I did. I mean, don’t get me wrong. I had a couple years of depression. I started drinking too much. I had to up my antidepressants. I cried all day every day. I lost too much weight, but I had to take care of two kids and it wasn’t about me anymore. I knew it had to be done.”

For more Brandi Glanville, tune into Famously Single on Tuesday nights at 10 p.m. on the E! Network and check out a sneak peek of tonight's new episode below.

Tags: Brandi Glanville Eddie Cibrian LeAnn Rimes famously single Reality TV E!