John Mayer and Katy Perry- Over Already

It looks like John Mayer broke another heart, what a surprise. John Mayer and Katy Perry have called it quits after just weeks of dating. 
But according to a friend of the couple, John may not have hurt Katy at all. The source told People that the two were just having fun with their relationship and they'll still be friends. Is that even possible?
Another source is sharing a completely different story with RadarOnline, "John did a real number on Katy. She's really upset about it." Well looking back on John's relationships, he most likely played with her heart. Her newly divorced heart. 
The two musicians started going to dinner and parties together at the beginning of August. Perry also had quite a few sleepovers at Mayer's house in California. 
Poor Katy, going from Russell Brand to John Mayer. How much crap can this girl take?