I really like a co-worker, but a relationship is not a good idea. We're both taken, and she'll be moving away in two years.

I have a strong connection with her and it inspires me to work harder and take care of myself better than I have in years.

Advise me on how to get the most out of this friendship and keep the connection as long as possible. I basically want to stay in the grey area between friendzone and emotional-affair. Has anyone else had success with this before? Is it impossible to maintain?