Solutions

 People make big, life changing decisions, in order to solves their problems.  You could marry the right person, but for the wrong reasons.  You could make a geographic move, quit a job and take a new one, become an exerciser, all to solve some issue in your life that bothers you.  So now you are married, living in a new town, with a new job, and jogging.  But you are not yet happy, fulfilled, serene.  A good reason to have sober friends, balanced friends, mature friends, is that they will tell you truth you cannot see or do not want to hear.  Unfortunately most people who make bad life decisions lack such friends or the trust in them needed to actually hear a second opinion.