If you have managed to get back to courting an ex-girlfriend, you will have to remember that if you want to keep her this time, you should try and do things different than you did the last time.
The fact that you have managed to get her back will mean that you probably had to work hard as exes are usually far harder to win over than a new girlfriend. Hopefully in the process of winning her back, you did not beg or threaten as if you did, the romance is probably once again destined to fail.
It isn’t every time that someone wants an ex-girlfriend back but if they do, it is going to take a lot of effort and so it should be for the right reasons. If you think you want your ex back because you miss female company, it would probably be a lot easier to find a new girl than try and win over an ex.
So, in order to justify the effort, you should be sure that the ex is the girl you really want and that having won her back you will do everything you can to keep her.
Towards that end, one mistake that many guys make is to beg the girl to come back. Tis o course can be very effective in winning her back but in the long term is a definite mistake.
When a man begs a woman to come back to him, it stirs up feelings of pity and sympathy in the girl and in a moment of weakness, accepts to come back.
The feelings of pity and sympathy though are only short lived emotions and as they wear off, the girl will realize that your begging has caused her to lose respect for you in such a way that that respect can never be earned back and so the rekindled romance will be short lived.
Threatening her or threatening to do something to yourself may also work in the short term but once again, it will only work because she has short felt emotions of either pity or fear and once those emotions subside, the romance is doomed to failure.
Assuming you have managed to win back your girl without begging or the use of threats, going about things differently will be your next problem. Perhaps some options you should consider are romantic weekends away from the hassles of everyday life.
Offer to take the two of you on a weekend break to the countryside where you can take walks through the woods or picnic in fields. A weekend by a beach may also work, taking strolls on the beach under the stars. Remember it was you that decided that you wanted her back and that you would do anything to keep her this time and so some extra romance is a good way to start.
If that weekend seemed to help, perhaps consider another to somewhere really romantic like Paris, although London can also be romantic if you go to the right places.