Here are some things that many women do that blow their chances with their ex, and how to avoid them.

First, sharing your feelings with him too early or too much. Men love their freedom and independence ­ no mysteries there! So when you announce that you love him, it often sets off a trigger that you might be one of those “clingy types.” Remember that the some stages of dating should always remain casual.

Only after you get to know each other really well should you pursue anything further. It’s also worth mentioning that you can’t logically convince someone to fall in love with you. Falling in love is a process that happens outside the conscious mind ­ remember that. Which brings me to…

Second, trying to push it too far too soon.It’s natural to wonder about the nature of your relationship, “Does he want more? Or is this just a fling?” But remember, if you start pushing commitment, you could ruin your chances to take things further.

Yes, it’s true, many men are scared of commitment; but just because they don’t want it now, doesn’t mean they don’t want to settle down. They just need time.

Third, being too available.You might think this is playing a mind game or
being manipulative, but putting your best side forward is also manipulative.

Why? Because it’s done to get a desirable outcome. This is simply a reminder to be who you were before you met the man and continue to be that person, rather than use tricks.

Remember that your busy, interesting and fun life only has so much time for him, no matter how much you like him. And remember, men love a
challenge, so this actually works in your favor.

Fourth, not being yourself. Men love confident women with a strong sense of
self-worth. Unfortunately, women often try to guess how the man wants them to act and try to accommodate his mold, which leaves very little room
for your own personality to shine. (And yes, men do this too.) In other words, they love her strength. It’s very attractive.

Fifth, appealing to his sexual side too much. Believe it or not, it’s NOT make-up, dyed hair, pretty clothes or even nice shoes that attract men, not into a successful long-term relationships anyway! While “looks” is the obvious factor that seems to get an instant response from men, long-term success comes with finding a man who admires and respects you regardless of your exterior. If your man only likes you for your looks, then he doesn’t really love you.

So there you have it. Some big mistakes that women make while they’re dating men. Avoid these mistakes and you’ll dramatically increase the chances of succeeding with him.
References :
"Getting Him Back for Good" by Michael Webb
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There are some resources like this which can help u get back ur ex.

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References :

One of the most effective ways to win back a guy is to be his friend. Even though both of you have break up but you can still be a good friend to him. Show him that you truly understand him and that you can be around him without causing any drama. Give him the impression that he enjoys being with you by joking with him and have a healthy friendship with him. Do not give up on winning him back as when the whole episodes of breakup subsided, your ex boyfriend may realize that he still needs you and would want to be with you again.

I reviewed dozens of books on how to get your ex boyfriend back and found several guides that meet my selection criteria. Read about them at http://www.waystogetbackyourex.com/
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