My 2 cents: dating opens up an entirely new set of problems. You're already making her jealous, she's already getting the 'losing you' vibe. Just keep heading the direction you are heading. Friendly dates can easily become emotional involvements (how many As start over work lunches?).
Then again, I do know someone whose separation ended when his W discovered his blossoming R with a co-worker. It brought her right back home, but I don't know that he'd recommend going this route--the R really muddied his feelings about piecing.
