Originally posted by FistOfThe North
Would the fact that the girl you wanted badly had a boyfriend, stop you from getting her to be with you?
How do you propose to "get her to be with you"? If her affections can so easily be won from her boyfriend to you, then they can just as easily be won from you to someone else.
Moreover, you also act as though she has no say in the matter. If she did not want to be with her boyfriend, she would not be with him, and conversely, if she wanted to be with you, she would be with you.
Ultimately, it is unethical to pursue someone who is not available, and even when you "win," you lose.