First off you should be getting your dick wet with other women. If that's not happening for you right now; still meet/approach other women. You want to have actual abundance and be striving for that, not focusing on just one girl.

Second, "fighting" over a girl is a fools errand. It inflates her perceived value and plays into her frame, exactly how she would like it.

You should be amicable towards the guy and never act like you're competing with him. You're both in the marketplace and there's chicks for both of you. If she's into him dont get defensive, dont even stick around, find another chick. It really is that simple.

Otherwise keep gaming her. Girls like a guy who's unfazed by their shit and competition from other guys.

At the same time you will sometimes also see a guy being overly possessive early on and it working. Just like beta game is a bad dating strategy that works for the wrong reasons, this kind of posturing and AMOG behaviour is too IMO.

Just be friendly and cordial if you have to meet him, or if it can't be helped. This dude is not your competition, nor is he your enemy. He's just another dude trying to get in this girl's pants, so be un-phased by it especially considering she's not yours. There's a chapter in the Book of Pook you need to see. It's a little long, but it might help you:

Lesson Four

A man found himself in the company of lovely ladies. Alas, also in company were several men of high esteem. They were more handsome. They had more money. They had more charm. They were better in every way.

But this man knew he had the goods too, if not in such a polished way. “I will be patient and let the cards fall where they may.” Notice that this was NOT inaction or an abrupt slowness. He did not let the lovely ladies’ attention get the best of him nor the success or failures of his competition.

The lovely ladies would cry, “Come here you!” and the other guys would rush to them. When they did it to the man, though, he just laughed, replied, AND WENT ON HIS WAY.

The other guys, more handsome, more beautiful, lost the girls because they could not hold back their desire for a girlfriend. The patient man ended up with the girls.

“I now understand,” he smiled with both girls on his arms.

“Patience is the refined sense of confidence.”

“But Pook!” cried the young man. “How can patience be confidence? Isn’t confidence courage? Isn’t confidence action? How is patience courageous or action?”

“Oh foolish boy!” and Pook slapped him. “Now let us summon up a Don Juan and observe his mannerisms.”

In a fountain of light descended a Don Juan.

“Hear me, oh Don Juan! There are women around and other men are hitting on them! What is your reaction?”

The Don Juan just shrugged his shoulders and laughed.

“What!” cried the young man. “These other guys are going to take his women! How can he be so laid-back?”

“He is laid back because he knows how great a catch he is and that getting women is easy. He knows he is the Prince.”

“But the women...”

“...are not significant! The focus must be on you! The guys that can get almost any women are not scared or nervous that other guys are hitting on girls. He knows things the other guys never will. In fact, he might let them have free reign to weed out the desperate and stupid chicks from the smart and picky ones. As with muscles, it is the strong guys that know they are capable who are quiet and patient. It is the noisy guys that lack the skills. It is the large dogs that are quieter while the small dogs make up for their size with their obnoxious bark. It is the patient ones that control the world; the impatient ones are controlled by it!

If you read my recent statuses on the trp . red side you can read an actual example where my plate surprisingly sprung competition on me out of the blue

She threw that onto me without any awareness there was ankther guy in the picture. I had no idea

But that being said, it wasn't worth it.

I have no enthusiasm to compete with another man. In my case he got competition anxiety and tanked himself. I didn't have to do anything but hold frame and be relatively disengaged.

Prior to this incident and before I knew he was also banging my plate too, he introduced himself several weeks before that and was very friendly to me

This incident made me go from being friendly to him to giving him an overt cold shoulder. He has since tried to say hi to me with more maturity than I am showing, and I did say hi back. I have no intention to be a dick to this man, who in all likelihood has no idea I was banging her at all

I am not going to go out of my way to talk to him because it disgusts me, but at the same time I am not going to express hostility when he probably didn't know.

My bottom line here is that, even considering a situation where you had no idea there was another guy, it still wasn't worth. She did this to me when me her and him were all at the same venue on the same night.

It really isn't worth it to overtly compete with another man. And it really made me extremely uninterested in her in comparison to beforehand.

If you are insisting on competing, you should do what I did and offer minimal reaction to it. I just let him be extra thirsty, I stole her attention back to me a few times with minimal effort and valid reasons, I gave zero drama when it was my turn to have her attention, and then waited for him to fuck up, because I had an abundance/I'm gonna still fuck her anyway whether you're here or not mindset and he didn't. He had a zero sum mindset and cratered and now they aren't seeing each other

If you try to see this to the other side it will probably disgust you. I haven't seen the plate since then and have ghosted her last text to me