ZAP, if there's one you really prefer, then go for that one and not try to go after one of the other's because it may just be more convienient, because then you enter a realm of mixed emotions. In which case, either go for the one you prefer most, or wait to go after one of the others until you've processed fully just why you can't go after the one you do prefer most. If it really is that they're all at parity, then first of all, throw out the one thats in a relationship. You don't want to be in a situation where you want to pursue someone already in a relationship because its a very bad spot to be in. You don't want to end up hoping the relationship ends for your gain, or making it seem like you do, and then if it doesn't end, you're just left hanging. If the other is too busy for a relationship (really, if there's any factor why the relationship just won't work at this point) then you don't want to put her into a position of having to make that choice, be courteous and don't force that one. So that'd leave the one you did ask out anyway. Plus a "you must do what you feel is right, of course" in there for good measure.