Mental Breakdown?

One hour of peace...
One hour of quite...
One hour of no thoughts and ideas...
One hour of nice weather...

Are these much to ask for? Where do I go looking for these?

I dunno whether its the sheer physical exhaustion that is driving me over the edge or the mental tension that keeps building up for each little thing....

Why does every little thing bother me these days? Why cant i take it easy and just let go ...?

Why not get used to living like this and close my eyes, ears, mind, and heart to these little incidents and daily disappointments without getting a lump in the throat and tears in my eyes?

How do people manage calamities in the world? How do they remain sane after huge losses and shocks....?

It seems in 30 years of my life ...i have already reached the limit...and broken down ...physically i can still smile and talk and keep working but....mentally...

Is this what is called a mental breakdown?