The pair, who have been separated for work over the past few months, have vowed to spend more time together in the next year, reported Showbiz spy.
"Jen and Justin love each other, they are fully committed. They had hoped to be married by now but work commitments this year meant their plans went astray.
"They have had some counseling. They both regret not spending more time together this year and they're determined that next year will be different," a source said.
"Jen and Justin are looking at it like it's a party for their friends. They've downgraded the scale of their wedding. Justin is adamant it will happen in 2014 but that it will be more 'spontaneous and organic' than they'd previously wanted," the source added.