updated 12/08/2010 AT 2:00 PM ET
•originally published 12/08/2010 AT 3:10 PM ET
The pair, who dated for about five months, “have broken up and remain close friends,” her rep says.
As for the reason for the split, a friend of McCarthy’s tells PEOPLE, “Jenny has been very busy with work and with her in Los Angeles and Jason in Las Vegas, it became difficult to continue a long distance relationship.”
In October, McCarthy, 38, raved about her good times with Toohey, 35. “I have been so open and truthful in this relationship – it is amazing,” she told PEOPLE.