Here is a great quote from a new article on this (from part 2 of 4):
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RIDE OUT THE STORM
How long do you wait for your ex to get in touch with you? Forever. You do not under any circumstances initiate contact with her. It could take 2 months, or it could take 2 years, there is no timetable.
I like to think of it like this. Every time you text her, you’re delaying reconciliation by 4 months. So if you text her 3 times, then you’re looking at a years sentence. The fact is that you need her to remember you in a good light, you need her to miss you, you need to let all the bad times wash themselves away in her head. Time will heal this ****, bad memories fade away, and only the good ones remain. It’s human nature, but if you’re always there bugging her, then you severely delay or nullify this process. Be very careful, this is the killer.
DOES SHE MISS ME, DOES SHE THINK ABOUT ME
The short answer to this is yes. You guys spent a long, long time together. She will never be able to erase you. You shared a connection that she will share with only a handful of guys in her entire life. There truly is an unbreakable bond that you 2 have, you can’t just turn that off like a light switch.
So if you lay awake at night thinking to yourself that she hates you, and that she’s completely forgotten about you; think again. No matter how you broke up, you will have a lasting impact on her life. In a small way you have shaped her life. Someone can’t just forget that, even if they tried."
http://slaytheday.com/how-to-get-your-ex-girlfriend-back-phase-one/
http://slaytheday.com/how-to-get-your-ex-girlfriend-back-phase-two/
http://slaytheday.com/how-to-get-your-ex-girlfriend-back-phase-three/
http://slaytheday.com/how-to-get-your-ex-girlfriend-back-phase-four/