If you are really interested, you would be in constant communication

This is your best weapon in the battle for the heart, if you are unable to be together.  Use it!

As Patti Stanger said, "You should be on his mind all the time."  "You should be on his calendar on the important nights of the week: Friday and Saturday."

Guys: If you actually like someone, don't play it cool.  Don't be their friend, don't just tip toe around them.  Do something about it.  If you really find someone interesting, you will make a point to be in their lives.

A friend of mine recently told me that a guy that she was interested in waited 10 days to call her while on a business trip.  Um, not a good footing there.  It gives us (women) time to rethink you.  If you don't want to be an afterthought, don't be.  Make a point to share some of your day with her, each day.

Don't be a pest, and respect her work time, but make sure you make a concerted effort to let her know you are on her mind, in a non creepy fashion.

Don't linger too long, you will be kicked to the curb if you wait too long.