I agree with what's been said, however it really depends on how significant Mr. Jenn is in your life. Also, you have to consider what kind of signals you're sending to the guy at the office. As Billy Crystal said in the movie "Harry Meets Sally", guys and girls really can't be close friends, cuz the guy is always wondering what'll it be like to boink her. While this may not always be true, there is some truth to it.

ITs always true (the boinking part) unless the girl is unattractive. *shrug* We won't admit it though, sometimes not even to ourselves ;) .