Why did Bruno Mars split with chanel malvar?

He caught her with another guy in her house which Chanel confirmed.

Chanel Malvar had a blog and said she never betrayed Bruno Mars. On the contrary he and Rita Ora got together while he was with Chanel Malvar . Rita Ora wrote about her love for Bruno Mars. "It was love at first sight." she said. This information is on internet-re: Rita Ora and Bruno Mars. Their relationship ended after one year. Chanel Malvar no longer has a blog. Wonder why??