Well i'm new to this forum, i've studied PUA techniques before and well i might just go back to that now. I've been with this girl for three years and i fucked up and cheated the first couple months of our relationship, she forgave me though. Since then i have not even chatted up another women, but did catch her talking to her ex behind my back. That was about two years ago, well everything has had it's ups and downs since we had our child together. I love my son to death don't get me wrong i'm there for him as much as i can be but me and her were to young. I'm 20 and she is 19 and well i love this girl to death. And well she started to show signs of not caring because to her i had pushed her away and i might've for a bit but i always tried to pull myself back together for the three of us. So i broke up with her only to find out she went to visit a guy at work the next morning. Unfortunately we all work together. I was devastated not because she saw a guy when we were broken up but because they were obviously talking before i broke up with her. So i started trying to flirt again and get back at the game to keep myself busy but i can't let go and kept going back to her. Well this past month things were getting better between us until my friend messaged me a photo of her flirting with another guy and calling herself "his girl".(Same guy from our work) She was always too perfect to me during our relationship but i feel like the instances i pushed her away it made her like this. By pushing her away in her head it was me just sitting there quiet which happened a lot. So i constantly blame myself and it depresses me more and more everyday. I have given up the gym, work, and almost dropped out of school. I am in denial of what she is doing because she was never doing this before so that's why i keep going back. Please someone just give me tips and let me know your opinions. Supposedly she never got physical with this guy and i'm still her first and only. But if thats true she is emotionally cheating. And at the same time i can't forgive her. So any tips, opinions, and ideas for moving on are welcomed. I can't let her crush me like this.

First off - welcome to the forum.

Secondly, I'm not really sure that relying on pickup to salvage your relationship is the way you want to go here. This is a forum full of guys (and there are some girls too) who are going to all give you the same type of advice: Move on, she's not special... find another girl because there are plenty of them out there.

I would agree with that advice normally - and I don't think it's wrong here... but you do have a child with her.

So, let's start:
YOU broke up with her. She can therefore do whatever she wants. I think you're angry at the fact she's with this other guy than the fact you've lost her.

She told you this? I'd take that with one large grain of salt if that's the case... Look at how pissed off you are at this situation, and you have no idea what they're doing together...

Wrong. You dumped her.

If you want her back, talk to her... don't rely on pickup or tactics or psychology... You have a kid together... She's going to be in your life for the next several years regardless, so at the very least you're going to have to learn to be civil with each other.