Not to be an asshole but since you have so many side chicks, have you ever considered the possibility that you were her side dick? This could be a clickbait post for money, but fuck it, judging from the typo, I'd say it was typed in a hurry and emotionally unstable state.

1. You did the right by not replying. There's nothing you can do once a girl decided she no longer needs you. Not groveling saves you your last bit of dignity.

2. Move the fuck on. Fuck another side chick. What you think is special about that particular girl is all in your head. You had fun then, you'll have fun again. Why would you want someone who doesn't want you?

3. If it's that hard for you, then cut all contact, delete anything relates to her, wipe her off the face of the earth in your mind. Then find a hobby, a job, an exercise, do anything productive to take her out of your head.

4. Treat people the way they deserve to be treated. Treating them well or badly is up to you. THINK with the head on top of your shoulder, not below. I know it's damn fucking hard but you need to get a grip. What would you do if she decides to come crawling back to you? Would you accept it knowing she'll cheat on you again? Can you even trust her after all this shit?

5. You know how it feels being on the receiving end. People either quit the business of having side chicks and settle down OR they become players until they can't be players anymore. Your choice. The way you see relationship and your actions will attract people who share the same view.

6. Some people are players because they won the genetic lottery. The rest of them became players because they were heart broken beyond repair. Play or be played, buddy. You're lucky the human male is prone to emotional numbness.