Speaking to reporters Monday, the 34-year-old said that "a lot has happened in my life in the past five months," but the hardest part was "having to look at myself in a light that I never wanted to look," reports Us magazine.
"The pain and the damage I caused my wife, my mom, my kids ... Going forward, I am going to have to explain all [this to them] ... but that's my responsibility. I did it."
The golfer refused to reveal why he went to rehab, but said it allowed him to "to take a look at myself ... I've come out better. I am certainly a much better person for it."
He said he never considered going to rehab before the scandal broke.
"I hadn't hit far enough on the bottom to make myself look at what I had done," he said. (ANI)