Jamie Kennedy and Jennifer Love Hewitt
03/30/2009 at 09:45 AM EDT
Jennifer Love Hewitt can raise someone's spirits – whether they're the troubled dead people on her show Ghost Whisperer
or her real-life ailing boyfriend.
Jamie Kennedy, 38, who earlier this month revealed that he's dating and in love with
his costar, 30, was vacationing with Hewitt Tuesday in Mexico when he started feeling very sick with kidney stones, a source close to Kennedy tells PEOPLE. The two flew back to Los Angeles Wednesday morning and Jamie went straight to the hospital.
"He had comedy shows scheduled in Boston, but he canceled them because of his kidney stones," says the source. "He felt better later in the day and went home, but on Thursday he started hurting again and he went back to the hospital."
It was unclear exactly when and how the problem resolved, but the source says Kennedy is "on the mend" with Hewitt by his side – and he's looking forward to returning to work.
"He's just home and feeling better," the source says.
In January, Hewitt announced she and her fiancé Ross McCall had broken up over the holidays