Now that Katy Perry and John Mayer are back “on” again, friends reportedly are worried about Katy. Specifically, friends are worried Katy is going to get hurt by falling in love with John, who has something of a reputation as a ladies’ man. A source dishes:

“Katy’s friends and family haven’t taken to John at all, in fact they are worried that she is headed for heartbreak. She’s been telling everybody who cares to listen how great John is and it’s clear that she is totally in love with him. At first, she was quite careful with John and said she wasn’t ready for a relationship and just wanted to have fun. But now she appears to have fallen dangerously in love with him and her friends are concerned.

“Despite the fiery image Katy likes to present, she’s actually more fragile than that, and when John dumped her a few weeks after they first got together she was devastated. Now that she has invested more feelings in John and has let her guard down, there’s only one way this can end… in disaster!”

John reportedly convinced Katy to give him a chance by explaining he’s changed his ways.

“John has had his eye on Katy for a while and he had to try and convince her that he was right for her. The best way he thought he could do that was by dispelling his past reputation as a lothario. He’s never been short of female attention in the past and has always been quick to milk that at every given opportunity. But John realizes now that it made him appear a bit of a douche bag and an unattractive catch.

“He knew he had to change his ways if he ever wanted to get serious with somebody and he had a heart to heart with Katy, telling her he was desperate to change his ways. Katy believed him and now their relationship is moving on. She wants to visit his home in Montana and has slowly warmed to the idea that he’s boyfriend material.”

People do change, but I admit, I don’t blame the people close to Katy for being worried!

Photos by FAMEFLYNET