Ok there is this girl that I was trying to get. Now we are part of this club for school so I always see her. Problem is she shows interest to my friend and not me, and she flirts with him. It’s clear that there is some attraction there. My friend already has a girlfriend and has no interest in her at all. Since I was trying to get her and she’s flirting and showing attraction to my friend, it hurts to see that. So my question is how I get over this because for some reason it just hurts to see her flirting with my friend.

outshine him, make her attracted to you

Try to pick up as much advice as you can from here. Read mysterys book venusian arts. Then read the game by neil strauss. This will give you an idea of the basics and what you should do.

Always aim to be confident and relaxed. Remember whatever happens "ITS NO BIG DEAL".

You must believe in yourself that your worthy of her attention and believe you have value that you can enrich the lives of others.
Everything starts at the inner game. Your frame IE "frame of mind", must be strong and should not callapse or give up at the slightest sign of failure or opposition.

Don't worry about your friend seen as he's not actively competing with you. Just work on your game and go for it.

_________________
Now looking back at all we've had...
we let so many dreams just slip through our hands...
Why must we wait so long before we see
How sad the answers to those questions can be?

If it hurts, it is because you "like" her. It seems to be more than just an attraction you have and this does not appear to be "some chick" to you. I think what you're experiencing is jealousy and that is okay. Regardless what any guy tells you, we've all been there. If I were you, I would do the best I can to ignore my feelings of hurt and pursue other female. Maybe try to bring a female from the outside into your club. Even better, I think you need to go out as soon as you read this and go get a number or two or three or ten. Don't get stuck on one chick. Especially if you are not getting anything out of it. Maybe she flirts with your friend to make you jealous??? To be in control I think it is very important you turn those feelings of "hurt" into motivation to find another chick. Like I said though, it sounds like you really like her. Maybe just ask her out somewhere. I've been rejected more times than I can count but f*ck it. Who cares? You come across as a nice guy so if she does reject you, jokes on her. She'll still be going nowhere fast flirting with a guy in a relationship who has zero interest in her and you will be on your way to a new chick.

If she is attracted to your friend then it doesn't mean that she won't ever be attracted to you, and by using the techniques found on these pages you should be able to achieve that, but my advice would be to go out and meet other girls.

I don't think the idea of pick up is to put all of your efforts into getting that one girl, it's more to realise that you have value and that one girl you've liked all along isn't as important to you as you feel she is right now.

Get over your fucking one-itis!

ok you said "my friend shows no interest in her". Thats what you should've done first, then get her to give u IOIs then move on to A3 which is male to female attraction that's when you start showing her your intrigued by her. Girls like a challenge especially if they're hot 9s and 10s. Maybe you showed too much interest off the bat and she lost interest in you. Learn from that experience and move on to another girl. Its just one girl, theres 3 billion of them in the world.