Los Angeles: Friends of singer Selena Gomez are said to be worried she may fall back into "old bad habits" and start dating Justin Bieber again since her good friend Taylor Swift has found love with Calvin Harris.


Selena Gomez and Justin Bieber. Pics/Santa Banta 

The "Heart wants what it wants" hitmaker is feeling left out since her friend started dating Calvin Harris and an insider claims she is considering reuniting with on/off boyfriend Bieber, reports femalefirst.co.uk.