Evaluation of my life

After recent evaluation of my life I am left feeling rather empty inside.  In the back of my mind I hear the phrases " Focus on the good"  "Stay positive"  " This too shall pass"  " It could be worse"  Yeah, I guess all those statements are true, but I'm just not satisfied. I am lost, I am cold, I am lonely, I feel like I've lost something very important, but just can't remember what it is. I'm 40 now and I'm not where I would like to be physically and most importantly - emotionally.  I guess I am to blame as usual, for letting "things" continue against my better judgement, against all rational thought, against what my gut tells me.  It might just be that first statement " focus on the good" that has gotten me into my current state of dissatisfaction. Although this state of thought has helped me through a many difficult times, I sometimes only allow myself to focus on the good parts of any situation that I wind up putting myself last. It sets me up for failure.  It ignores what should sometimes never ever be ignored.