I am 45 years old and have smoked hash and weed for thirty years.
As well, i have smoked cigarettes for the same amount of time. In the last year my lungs crack and rattle when I am in bed, my short term memory has diminished.

After reading forums on similar topics I find that I identify with some of the symptoms and problems a smoker has. I decided to quit for many reasons.
1 My lungs crackle and I imagine i have lung cancer when high.
2 I spend 240 dollars a month on weed and 160 dollars on cigarettes
3 My memory is not what it used to be
4 I am tired of chasing down my dealer to ensure my supply
5 I dont like smelling like a roach when at a party

However the purpose of my contribution to this post is for this reason,
I am no longer able to tell whether my anxiety, inability to concentrate, and unhappiness is caused by my usage of weed. I will peel off the most obvious layers to uncover the mystery and keep it simple

I wish you all luck in your attempts