If you don't travel now, you might 'live to regret it'. [=you might feel sorry or disappointed about it in the future]
We 'regret' to inform you [=we are sorry to tell you] that we have offered the job to someone else.
It is to be 'regretted' [=it is regrettable/unfortunate] that the program has lost its funding.
(..) god there are some fucked up fish out there oh look at that one. waspy white guy fish i married the wrong woman, and now i lead a life of regret oh look at this guy, i went to new york once, in and i just did not feel safe ted, you gotta move out you...what (..)2012 Ted