Singer Justin Bieber reportedly feels that his ex-girlfriend and singer Selena Gomez will come crawling back to him.

"Justin knows that he will always have Selena at the end of the day. No matter how many girls he sees when he's in whatever state or country, Selena's the glue that holds his heart together," showbizspy.com quoted a source as saying.

"He doesn't think Selena cares about what he does. Their history has proven that time and time again. She's not going anywhere," added the source.

Recently, a source close to Gomez said that she wants to `erase` Bieber completely out of her life.