What you seem to think is candid, useful communication is anything but.
If you are attracted to someone you're going to be working closely with, there is a time-honored approach for dealing with it. You flirt. If you're good at flirting, then it is non-serious and does not create a threatening atmosphere. It shows off your positive personality qualities and hides your negative ones.
Most importantly, it gives the lady in question an out if she doesn't want to go there with you, she simply doesn't respond. If she doesn't respond to your flirting, then she's not interested and the stand-up, manly thing to do is to stop flirting, and carry on your working relationship in a completely professional manner.