Nah, it leaves you too exposed to the "we're just very good friends" scenario.
I recommend this:
enlist said girl to help you find your perfect partner
in doing so, obviously identify all the qualities you are looking for (don't be tempted to make cheap sexist and lookist comments)
coincidentally, it will become obvious that she shares (all!) these qualities
in searching, you must also endeavour to appear totally desirable (to her as well as others), so no awful personal hygiene etc; appearing vulnerable to her (and no-one else) is typically good (if she is after the sensitive type), although it can backfire;
do date her suggestings, and this will help:show her how much others like dating you
give you some practice to do in the meantime
[*]eventually (not too early) try to engineer some direct comparisons between her soon-to-be-ex and you, in things that you are confident with and better at (like philosobabble, for example )
If that doesn't work, you'll have found someone else in the meantime, anyway.