she has a boyfriend!! does that not explain the situation to you? If she did like you in that way, then she would be with you not her boyfriend...just because she is sweet, nice and pretty does not give you the right to assume she is yours for the taking!! Or even the fact that she likes you in a sexual way, she just may see your connection as a form of friendship and sees you as nothing more. Even if she does become single it doesn't necessarily mean she will want a relationship or even be with you as I am sure there are many other guys. Sorry mate there is a reason why she is taken, don't wait around when there could be someone equally as special!!