I am seeking advice on a strategy that would maximise my chances of
reuniting with my wife. A reference to someone who's able to provide
such advice would be valuable as well. Here is the story.

For the past 7 years I, male, late twenties, have been blessed with an
incredible union with a woman (early thirties) that was as much of a
match for me as anything I imagine can be - a true soul mate, if such
thing truly exists. And all this years, I am convinced, she felt the
same. Despite all that, I threw it all away a few months
ago, when feeling overburdened with the realities of being in a long
term relationship since early age, I had convinced myself that I feel
void of romantic attraction to her, had developed a crush on someone
else and had revealed all that to her.

She took my revelation hard and after several weeks of misery insisted
that we separate, and quickly turned around to date someone else. She
has since been with this person for few months with an increasing
level of commitment.

As for me, it didn't take me long to realize that relationship just
needed well deserved work and ending it was a terrible mistake.

So far I have been following a strategy of maximizing the appearance
of happiness and positivity, attempting to maintain moderate level of
communication and even spending time together, refraining from
criticizing her in any way as well as refraining from expressing my
feelings for her, so as not to push her away. One time I deviated from
that policy was a month ago when I explicitly expressed the desire to
reunite with her.

But often I am driven to interrupt the communication to allow her to
"miss me", or to tell her how much I am still in love with her in an
attempt to amend what I said six months ago.

I feel very unconfident in my actions and would higly appreciate
advice or a reference to a qualified advisor. Thank you.

Ummm....I didn't see anything in your strategy along the lines of:  "I'm sorry".

So what you're saying is: if I twist myself into enough knots, become
someone I'm not - can I get her back?  The answer is, no.  The knots
will come undone, and you are you.  So, if you're sorry, tell her. 
Tell her you want to get back together, now.  If she is your "Soul
mate" then you can NOT screw this up.  Just be yourself tell her
everything you want to tell her and then move on.

try reading the book "stop your divorce" by homer mcdonald

Go out and get Dr. Willard Harley's book "His Needs, Her Needs".
Also, get yourself right with God, read the Bible, and start living as
a Christlike man.

As for where you could find a qualified advisor, I would look at this link:

http://www.nanc.org/counselors/index.php

It is an organization that certifies Biblical Counselors.  I've known
several members of this group and they will be able to give you some
of the best advise around.  You won't regret it!

I do agree with robertmn-ga's advice to get Dr. Harley's book, but I'd
also suggest going to his website: http://www.marriagebuilders.com  He
has an approach very different most of the tired and ineffective
advice you will get elsewhere, but once you understand what he's
saying, you will see why it works.

Best wishes,
Byrd-ga

Now that she's with someone else, you should ask yourself if she may
actually be better off with him.  Your motives sound purely selfish,
and with that kind of thinking you are never going to understand what
she may be thinking.  And without understanding that you have no hope
of resolving things.