The 61-year-old 'Schindler's List' star lost his wife in 2009 when Richardson suffered a severe head injury in a skiing accident in Montreal, reported People magazine.
"I was drinking too much. It started since my wife died. Pinot Noir: That's all I drink. I was never into spirits or liquor, hard liquor. And I gave up the Guinness years ago," Neeson said.
The actor does not drink heavily anymore. He said he is keeping himself away from relationships these days.
Neeson said he is busy raising his two sons Micheal and Daniel.
"My boys are teenagers. They're experimenting. They're flexing muscles and sometimes dangerous avenues, and you think, if Tasha was here, someone could share this.' But yeah, we're doing all right, you know?," he said.