The time right after a breakup can be quite a confusing one, and it's easy to start to feel lost and a little desperate. One of our natural inclinations in response to this problem is to try to stay near to our exes and "cling" to them...which is a very bad idea, and here's why:
A bit of space between you two can have only good effects...while staying near to one another will have a whole list of bad ones if you're not careful. Here are a few things that could happen if you stay too "cozy" with your ex...
1) More fights could break out from the stresses involved in the breakup, causing MORE trouble and making it even harder to convince him to give it another try. Keeping your distance helps serve as a kind of damage control to keep added friction from happening.
2) You could easily end up appearing desperate and clingy...which aren't flattering views of you and won't help your case any when you're trying to convince him that it's a good idea to shoot for a positive future between you two. Putting some space between you two will help you keep that desperation away from him so that you can work on it in other, more healthy ways.
3) You run the risk of being taken for granted. After a breakup, if you two don't really "break up" you're just in the same kind of relationship as before, only with no commitment. There's not need for him to take you back, because he never stopped having you...and NOW he gets to have you and anyone else he wants as well. Not a strong motivator for reconciling...you need to force him to deal with the consequences of choosing a life without you, by actually making him live his life without you.