There are people that if they and their girlfriend or boyfriend break up, they just continue with their lives and find a new one however, there are also those that want to try and get their ex back and that is often harder than just finding a new one. When someone tries to get an ex back, it is sometimes referred to as un-breaking up and there are websites online which can act as an unbreakup guidefor these people.
What these websites do is give advice as to the best ways to try and get an ex back and almost all of them agree that the one thing which you should never do is beg for them to come back. The thinking behind this is that the ex, when they see you begging, will think of you as weak and so although they may get back with you, it will be through sympathy only which of course will soon wear off and you will be on your own once again.
It is never a good idea to stalk an ex as that will only aggravate them and cause them to totally dislike you and so you must try and arrange an accidental meeting and seem somewhat surprised, asking them how they are doing and wishing them well. You can of course mention that you miss them and wait for the response you get, if favourable, then try and build it from there. If the response is not favourable, perhaps suggest you are in a hurry but would like to talk to them again sometime, prompting a better response.
Before you do any of these things though, due to the fact that getting an ex back will involve a lot of work and of course a great deal of apologizing, you should be sure that it is what you want. Think about it and how you feel, decide if it is just the company of the opposite sex you miss or is the person themselves. If you decide it is just company you miss, then it will probably be far easier to just find another, new friend. If however you decide that your ex is your real soul mate and that you really do want them back, then take your time and make your move carefully, not trying to rush them into a decision you may not like. Give them space to decide that you are what they really want to.
The online guides though of course are only guides as everybody and every situation is different. The guides though may be able to set you on the right course for success and help you to avoid the common pitfalls that others have experienced. A guide therefore may be good but it does not know your ex, you are the expert on them and so adapt their suggestions to suit your ex and then try your best to regain the trust, respect and love that you hope for.