The hardest thing in the world is to get a girl with a boyfriend. You must know how to get a girl with a boyfriend before you approach a girl who has a boyfriend. Normally every girl would like to test the extent of your love by creating such situations. In some situations where you have to be somewhere else but she wants you to be with her, you must be very careful in what you do.
These are situations where you can establish how much you love her. Make her feel comfortable and happy all the time because eventually it is what matters to them. Being happy is something that you have to create rather than let the situation flow on its own. You should make things happen for you to be happy with her. When you are on a first date you might want to know what stuffs she like and what stuffs she does not like because this little trivia are the ones that makes the biggest impression.
The other hard thing about winning back a girl is that they know your weaknesses and the way you work towards her. You must shed the predictability and be a new man. The macho factor is an important thing in deciding the fate of the relationship. You may want to know more about the relationship because only then you know your status of the relationship. Do not give up so easily because it shows how much you value the relationship. You may not know the value of knowledge of minute details about your girl because they usually show up big on the stage of love.
The amount of planning you have to do is really extensive and you should be very meticulous about the details. Winning the girl of your liking especially when she is committed with some other guy takes some toll on you mentally. You got to jump off the hurdle and then shrug off the difficulties with right planning.