it kinda sounds like you weren't ready for the relationship to end or
that you think there is something that could have been done to save it.
i know it's easier to say than to do but you just have to realize that
it's over and best for both of you to move ob with your life. don't hang
on to the past

Its a normal thing to feel the way you do because marriage is a mindset
of being with someone for a lifetime but you will get over it and feel
better at some point.My suggestion would be to keep busy at all times
and consume your time and your thoughts with positive and constructive
things.Go to the coffee house and socialize in the morning,meet new
peaple.Find a new groove for yourself because obviously for some reason
or another the old one didnt work well.Accepting the reality of things
is the first step to fixing a problem so accepting that you are now
single is the main thing and if nothing else.....it could be a lot of
fun looking for a rebound!
good luck!