You would be just absolutely amazed at how many emails I get asking the question,
"WOULD YOU HELP ME GET MY GIRLFRIEND BACK?"
It's truly shocking, it is. They usually go to the tune of "My girlfriend left me. She is a big fan of yours. I've tried everything to get her back and nothing's worked. I just know that if you were to email her and tell her that I love her, that she would listen to you."
I even had a guy once tell me that he was a heroin junkie and that he didn't blame his girlfriend for leaving him because he had done every bad thing to her he could do and put her through a living hell... yet he still wanted her back and asked if I could help.
Well, let me tell you fellas.... I'M ON YOUR EX-GIRLFRIEND'S SIDE!!!!
If she left you, I'm guessing there was a damn good reason (especially in the case of that junkie!). Moreover, think about what you're doing. Instead of trying to fix the situation by doing something real and tangible in your daily lives, you are reaching out to a total stranger that neither of you knows personally and asking him to fix your life for you. Dude! I mean, really. Does that make any sense? Let's say hypothetically that your girlfriend left you because you're lazy or mean or an awful person or maybe just plain boring. And I send her a message saying, "So and so really loves you, please give him another chance?" ... on the off chance that she is actually dumb enough to listen to the advice of a total stranger who doesn't know you, what are you to do the next day or the day after that. Once the initial glow of your romantic gesture wears off, and you go back to seeming like, well the person she felt she should leave, do I need to email her again? Where does it end? Do I eventually have to move in with the two of you? It's just crazy!
My advice to you is to buck up and be a man. If you've done all you can do to fix the things about yourself she didn't care for and she split anyway, let her go. Asking strangers to put in a good word for you is... well, really weird.