Megastar Amitabh Bachchan may have had a short tryst with politics but the actor says he is still not able to get over the times as he "regrets not fulfilling the promises" he made to the people of his constituency- Allahabad. The 73-year-old National award-winning actor took a break from acting in 1984 to enter politics in support of long-time family friend, Rajiv Gandhi.