The couple's heavy workload is said to have contributed to the end of their romantic relationship, reported Ace Showbiz.
Longoria and her boyfriend, who were spotted in a vacation in Spain earlier this month, thought that their relationship would not work as the 38-year-old actress spends most of her time in LA while Arguello is in Miami.
The pair met for the first time after Arguello was cast in Longoria's reality show 'Ready for Love' in April. They began dating following his split from former Miss USA Shandi Finnessey.