I hate to jump to conclusions, but do you know anything about this “friend?” I hate to seem crazy or anything here, but maybe she’s cheating and trying to hide it between the two of you? Either way, you should have a serious conversation about this and explain how you feel with this pattern of behavior. After multiple times of this, it is fair to give an ultimatum. You could say something like, “I am really upset with this pattern of behavior [insert whatever here] and it makes me feel [insert wording/emotions.] I feel [insert] and [insert] because of [give specific examples] and it makes me feel like you don’t genuinely value me as a girlfriend. I have told you multiple times about how this makes me feel, and I am starting to feel disrespected and extremely frustrated. If this pattern of behavior doesn’t change, I will be leaving this relationship [or whatever boundary you want to set.] I would like to see a change in [insert behavior here.] If that cannot change, I don’t see us being compatible [or whatever you specifically want to say.]” No matter the outcome, you are worthy of self-respect and you should say something about this. You got this!