Pacquiao, 33, listened to his wife Jinkee and mother Dionisia make tearful appeals for the Filipino to quit.
But he said: "I'm looking forward to a rest and then I'll be back to fight."
The defiant stance is at odds with the wishes of his wife Jinkee.
Pacquiao not finished - Roach
In a television interview she said: "When you see your husband get hurt, you cannot even sleep."
And when asked if she wanted her husband to retire from boxing, she said: "You know the answer to that. He knows what I am asking him."
Pacquiao's mother Dionisia made a separate appeal to her son, asking him to give up boxing and concentrate on his other interests - including his work as a congressman, hosting a television game show and Bible preaching.
"I have long asked you son, it is time to retire because you started boxing at such a young age. I always pray that he will stop. I asked God to tell my son to stop," she said.
Pacquiao, who started fighting professionally at the age of 16, insists his defeat was not a sign of a decline in his ability.
He added: "I am OK. I just got over-confident in this fight. That is part of the game - sometimes you win, sometimes you lose."
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