I am unorthodox, not
a psychiatrist.
Blame the media for giving false influence on people like you - a
meet up after ten years of separation doesn't mean fate to be
together, as portrayed by shows. Astrologically speaking, there are
possible Pluto connections and other lasting bonds with one
another, which you both have in each other and result in an
unbreakable invisible cord.
There are two side of a coin to these effects - firstly, if your
both are married, divorce cannot be an option. Secondly, if you two
are not together for certain reasons, chances are: it's linked with
your love cosmic karma - the villian that always delude people to
think that 'this is true love' OR 'The One'....
... when in fact it's a test to see if you could realise some
relationship are never meant to be there in the first place. How we
handle our own love crisis will result in either growth or
degeneration. 
You want to live out your misery, you have to understand the source
of your misery - you will realise that it never came from her, but
it seeps from your preception, thinkings, emotions and
actions.
***
If you can't stand having just a simple friendship. Avoid. She
can't give you the affection and adoration that a Leo would need in
return for your love. You tried so many years to hold onto the
moving truck - why wouldn't you try and release the tight grip? I
would tell you, it's much easier. Yes, you will hurt yourself when
you land, but that's about it.
Yes, that's about it.
Believe in respecting space, freedom, freewill and decision. You
will gradually see the bigger picture. Be a driver of your own
love, not a thief trying to fit in somewhere. You can't because all
is taken up - there isn't a perfect place to put you.
Cheers