The actress was first spotted with the ex-builder in May, and Sculfor allegedly moved into Aniston's Beverly Hills home in mid-June.
However, British tabloid reports claim the couple has been forced apart by their demanding schedules and Aniston's willingness to have children.
A source tells The Sun newspaper, "There was chemistry, but the truth is that Jen wants to settle down with a reliable man and start a family.
"Paul wants travels a lot and is constantly surrounded by beautiful women. They remain friends but are just in different places."
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