談戀愛
出自維基百科,自由嘅百科全書
談戀愛,
In short, it can understood as "In-Love". But, the concept is rather social rather than personal feeling. Therefore, it is a stable dating in which the participants (i.e. lovers) express their feeling and loves toward each others.
It could be a polite form of "拍拖". The whole concept is rather pictural - A picture in which a woman and man involves in series of flirting, negotiation and a lot of talking... (but sex is not expected because 談 is a verb for talking and negotiating).