When I find someone really attractive, I become extra timid and tongue-tied, eye contact becomes difficult (when normally it is not a big deal), and I run away ASAP. If I manage to get past this stage with someone, or it's more of a situation where a friendship is becoming romantic in nature, then I make time for that person, set aside my energy for them, share semi personal info with them, show interest in their life, may talk more than usual, etc (Amanda's list is good). I suppose that's the more typical way to show interest. I never get to this point unless I pick up clearly that the interest is returned & it's a no pressure setting where I can relax a bit. This may also be confusing, because I like someone platonically, then I may behave similarly..... I'm not sure how to differentiate the two. I admit I am bad at these things....my signals are confusing.