Originally Posted by
HealthFirst 
Because I owe it to this guy to be there. It is -almost- as bad as missing his wedding "because there will be an open bar there". I want to work on self control, being direct without worry of judgment, rather than avoiding places.
A wedding is different since a number of people there will not be drinking. However, at the bachelor party, it sounds like you will be the only non-drinker.
But if he gave you a kidney, I guess you do owe him. Short of that...I do not see what he could have done for you that puts this obligation on you.