Are Selena and Demi Feuding?

It's true- Selena Gomez and Demi Lovato are not on good terms! It all started when Demi unfollowed Sel on twitter and then posted this cryptic message: "Swimming away from your drama. Bye." So, what gives? Sources say Demi is fed up with Selena always crying about Justin Bieber, then getting back together with him! "She's sick of Selena's boy-who-cried-wolf mentality," an insider dishes. These two have hit speed bumps before though the M editors are confident they'll find their way back to BFF status!