You can't control this shit men I really feel you, this happens often on a relationship as a dude I have handled many times this situations with my previous relations, and you will not prevent this, this is the way how their mind works, we know what that is unfair, but it is what it is. If you feel what you are doing everything to bring her with your friends to have everyone what you love on the same trip, and she don't want to feel that experience, just keep going with this without mattering what will happen on the next fight with her. That's they way how they start to control you, when they start to notice what you care more than they into the relationship. Everything must be 50/50 If you go with her friends, she must go with your friends, without caring where are you staying or doing. Be equal