You say
You love her
Shes your best friend
We dont argue really
You are both working anti social hours.
If shes your best friend how come you're not talking?
Think seriously about this. Best friends talk, stay in contact, chat about anything and everything.
You are not talking to her, and...
i want a life of my own
You want a life of your own, yet want a wife and family? I'm 
This is your life of your own.
Did you make a fundamental mistake in choosing this? It can be relentless, and it sounds like you both work too much.
Can you pare back some hours? Stop working saturdays. This way at least you both get one full weekend together, and can alternate Saturdays and Sundays for free time.
You must be reasonably well established financially after setting up together what, 18 years?
You both need to make room for family time and alone time and couple time.
If you neglect putting energy into being a couple what couple is there?
I'm not.sure I'm convinced you want to be part of a family any more.
Its easy to cast around and think others lives look more appealing, from the outside.
If the single life is what you want then do tell your wife sooner than later. She will want to get on with it and deserves to know so she can makes her own plans and prepare the dc.
You do have what you wanted, but maybe you don't want it anymore?