he has also shared laughing & joking with her....but this doesnt seem to be the issue, your issue is a self esteem issue & sexual one.

note this, if a girl in your group likes this girl & she fucked him off... he doesnt think "HA IVE FUCKED HER" he may say it, but he doesnt think it...

he thinks "i wanna fuck her again" but he cant... coz she likes u now.

ur issues are YOUR issues

Couldn't care less how many people a girl has slept with, or how many people in her social circle she's slept with, or if she's had threesomes, in fact I specifically want to meet girls that are into threesomes, have experience with a variety of men and a laid back attitude towards sex.

This maybe because I've literally just come of a relationship with someone who is none of these things, a sweet nice innocent pure girl who believes in monogamy, love and emotional sex. I just want filthy hot bitches for no strings sex without all the other stuff for a while.

And that there is the crux of the problem.
I only get this insecurity with girls I become attached to and it's not an insecurity of whether I'm better, it's an insecurity of not wanting to see the guy who used her.
Ok, now imagine you fall for a girl and you find she has friends that she slept with who liked to have filthy hot sex with her, just wanting to use her. Do you care? Think of someone you were emotionally attached to.

There seems to be a general consensus on this forum of not trusting girls or that they are going to run off and cheat. I don't know if that's what causes most on the forum to follow the game lifestyle or not. I don't share the same mentality, I've always trusted the girls I was with even if we split up later for other reasons.

Only a fool trusts somebody 100%
Why is having hot filthy sex with a girl "using her". MAYBE she wanted it just as much?

Even if the girls "lad mates" did use her for sex, why should you care? She's old enough to make up her own mind. You have to get over this mentality of feeling threatened by exs and her high sex drive and high sexual desire for cock. It will only get in your way in your pursuit for happiness.

Like someone else said, I WANT GIRLS who like threesomes. Think of the possibilities

not threatened by their sex drive, I enjoy it being with them but quite frankly I don't want to meet someone who she had sex with.
The thing is that you, al_phaD, want girls to have threesomes with so you can have 3somes with them and enjoy the sex. Try meeting a girl you want to have a LTR with but in the knowledge that she slept with 2 of her mates in the group, perhaps had an orgy, a MMF 3some, you would quite happily get on with those guys would you?

i woudlnt, but then again..... i woudlnt get myself into that situation

Sometimes you don't know until later.
I have ended a few ST relationships based on this as it generated all kinds of bad feeling. One girl had had a FB for 8 years even though it was only once a year. She wanted to invite me to one of his house parties - I told her to fuck off - it just shows a lack of respect for the person you are with I reckon. "Hi, my name's xxx and I used to bang the chick you were with for sexual release once a year." "Hi, nice to meet you, want a beer so we can compare notes?"
Of course she tried explaining that she suppresses any attraction for this guy as she was with me and felt more for me but I generally end relationships with girls like that as it just leads to bad situations.