Hang in there man. Like a couple others said, it will get better.

It's been a year since my wife and I separated. First few months were rough.

My two cents on getting through the whole ordeal:

-be civil towards each other.
-try your best to settle the divorce specifics without lawyers and then get one once you agree on everything and hammer out an agreement. If not, be prepared for a butt load of money out the window in fees. I could have new truck with the amount spent so far. (I'm assuming you're not divorced yet)
-don't be afraid of getting some outside help. $20 to $70 a visit is worth it to help get your head back on straight.
-Watch your finances. Never know what can happen (like a drained joint bank account )