Many men at some time may have won an ex-girlfriend back but for everyone that was successful, there would have been many that failed as winning an ex back is not easy, especially if you want to keep them this time. Fortunately today there are websites like www.getherbackguide.com which can offer advice but even with that advice, it may not be easy.
The site does though offer some very sound advice which includes never begging your girl to return to you. The reason for this is that although it may work, it will work for the wrong reasons and so may lead to an early break up again. I girl may return if she pities you and that is the main reason they return after you beg them but that pity will run out and there may be nothing else left so please, try and avoid that if you want to keep them.
So in order to take the best approach to getting her back will be to first learn and understand the reason why she dumped you in the first place. This may be easy to learn but often not so easy to understand but you must try. Obviously, if it was because you were seeing other girls then the solution is easy, stop seeing them but other reasons may be more complex and take some time in learning how to change them. The point is though, to learn what those things she doesn’t like about you are and change them.
Wanting your ex back for the rest of your life though may mean that if you have to stop a bad habit to get her back, you may never be able to take back that habit, not without risking losing her again anyway. Unfortunately you will have to stop too as just saying you have stopped may not be convincing enough to her, to be honest, and only say you have stopped when you have but if you are only trying to stop, show her what steps you are talking as she may accept the effort you are putting in to get her back and that can certainly help, if not win the whole deal for you. So learn and act but do not beg and grovel.