I think it is very childish not to let someone know you like them or him or her just because you are afraid of non-reciprocated affection. Although some circumstances (as being with someone already)also determines your openness, such as better to not say anything for it might disturb the equilibrium of the relationship. Although for me, if I like the person, I know I can say something to the effect of liking you. But the moment I realize there is another person involved with him, my liking diminishes to pulp bits. Hahah! And this is so true! :)

As far as the dare goes, I will dare based on the assumption that everything is all in the name of fun! Limited shall we say?