I got a girl, everythings just fine and stuff, we were having a great time together, she told me once, that there is a guy, who is been around for like several years and she told me that nothing with him has ever evolved, meaning that they weren't intimate with each other and stuff because as she said "There is not turning point, we are just friends", and couple of stories such as, when she got fired from job, the next day she found a bouquet of roses next to her door apartment guess from who... So the point is that she texting him, like he is her personal diary to write everyday shit, including our relationship, for instance when we quarrel - the moment I knew that she is giving him updates on her life including that part where I am presented, I was mad, I told her that this is called a personal life shouldn't be anyones business.
The other day we were together and all of a sudden that personal-diary appeared, and I noticed that glance, guy knew me even before we met, he knew stuff about me and her, this is awkward a bit, but I pretend that I didn't know who he is, long story short, that ends up with phrases like: "You don't know her, you don't deserve her! I know her for years and she meant for better".
So my question is, what is the right thing to do here, beside kicking his ass? Should I insist that she ought end up with that guy? I mean I don't give much fuck about neither of them, but situation is quite uncomfortable.
What would you do?