Im really friendly and crazy about a girl called emily but the problem is that she is also my sisters friend and she knows i fancey her but she doesnt reply what do you think i should do?
Well, if she ignores you, then that probably means she's not interested. Unless she is playing hard to get..but you never know..I would play it safe and look for hints. Well, atleast that is what I do. I am the type who looks for hints, that way I will know when the time is right to ask this guy out. If you don't look for hints, you might be really shocked when someone turns you down. Or, if you are lucky, really surprised when they accept you. :-)
Ask her/him out if she/he says no slap them hard and throw them out of the house. Never works for me but thought it might for you cause you sound like a loser