John Mayer is no longer a part of Katy Perry  but why?

The two have reportedly broken up, and word has it that John was envious of Katy's career, according to the latest issue of People.

“He’s very defensive and comes across as extremely jealous of her career,” a friend of Katy's reveals.  

“He’s basically using Katy, who fits into his plan to stay in the spotlight right now,” another source says about John.

“His whole moving-to-Montana stint didn’t get him the attention he wanted, and he has been going a bit crazy not being able to sing because of his vocal illness," the source adds.

Meanwhile, Katy's friends have noticed that she seemed less interested in talking about him lately.

"She used to say things like, ‘John’s working on new music,'" her friend reports. "[Recently] she didn’t mention him at all.”

Plus, Katy might be looking for someone who's a bit more stable and more eager to start a family.

“She is worried about getting older, which sounds ridiculous considering she’s 28," her friend says. "But she does think about the long-term plans of marriage and babies.”

As for Katy's part, on March 15 she tweeted a link to the song "Landfill" by the rock group Daughter. The song contains the lyric,  “Throw me in a landfill / Don’t think about the consequences... I want you so much, But I hate your guts I hate you.” Yikes.

So we're not sure if things will get hot between John and Katy once again, but for now they seem quite cold.

Source: People, Twitter