anyone ever have that?

Ill give you the story here

there was a party last weekend that I went to. No its not what you're picturing.. It was a poker party, and supposedly some girls were supposed to go. I didn't care either way, I was there to have fun anyway. But at the same time, I didnt know anyone there except for 2 people. So there was only one girl there. AND lemme tell you, the biggest AFC was bugging her the whole day. They seemed like good friends, she was nice with him, but with the actions he took, its obvious "niceness" is all hes getting. I wanted to butt in. In fact I did some simple teases, introduced myself. But I couldn't get myself to do anything in the end. I kept thinking, hey this guy is a friend of the host, MY FRIEND.. I was getting IOI's for sure I know my shit, as new as I may be here.. But yeah, I was just wondering if this is something I should keep or attempt to get rid of as part of my "inner game reshaping plan".. Ideas? anyone?

Inner game is not about being a twat. If you like the guy and you think sarging this girl will hurt him, don't do it (though, of course, he will never get anywhere with her). There is no PUA law which says you must sarge your friend's girls. Indeed, that sort of thing can cost you in the long run by damaging your friendships and standing in the eyes of potential partners.

PUA's sarge girls who say they have boyfriends because a) they may not actually have one b) They may be breaking up with him and c) you don't know the guy and he might be a jerk anyway.

well i neglected to add a couple facts
one being, I was interested
secondly, I dont club, and I do prefer meeting people the way I mentioned here. Don't ask me I sorta just do.

Im just thinking, if I hesitate, someone's bound to be interested in her, and its gonna hurt them in some way anyway. I doubt I can avoid it if I keep thinking about that.
Tell me if your view on this changes after I tell you this.

I think if he is a direct friend meaning your friend, not by introduction or friends friend but yours ... then I would not pursue ... but if he is indirect all is fair ... personally I think you should sarge her and capture it ... just don't put him down to make yourself look better .... next thing man you need to get out your comfort zone that is what this thing is about you need to get out there if your not the club type of guy there are still alot of events that happened weekly that you can attend and find attractive women and practice ...