The 19-year-old left Cruise's USD 40 million mansion in Beverly Hills to the Los Angeles wholesale district also known as Skid Row.
The teenager wants to be with her boyfriend, musician Eddie Frencher, reported Showbizspy.
"Eddie and Bella have been dating for some time but have deliberately kept their romance under wraps. The couple decided to go public at Connor's birthday party recently because Eddie and Bella have discussed marriage," a source said.
"They won't be getting married anytime soon but they are getting pretty serious very quickly," it added.