Well, i certainly believe that if you want to let somebody know that you like them, you should tell them.

I, on the other hand, have experienced being approached by girls saying that they like me (which many of my friends think is a bold move) the old fashion way and also...in some weird circumstances. However, did i get together with them just on the basis of their approach? Nope. Some of them were strangers whom i don't know all that well (admirers from a distance).

I suppose its just a matter of prospective. Some guys will feel a sudden ego boost (which is usually the case) and some will talk it out with the girl, which i think should be the right move or else you'd be breaking the poor girl's heart and effort summoning up the courage to express her feelings. In the end, whatever the outcome is, take it with a pinch of salt. Not everyone will just say 'yes' blindly (assuming the bloke is a despo or a player).

Oh, and if a girl admits she likes you when she's drunk/high, just forget about what she said. She'll most likely not remember she said that and feel bloody embarrassed about it. I had a girl calling me all the way from Singapore during my exams telling me that. Funny.