Considering I am a tomboy, I have a friend like that, he loves her to death but I am his bestfriend, I dont look at him in any sense other than a friend and we both respect each other. Sometimes we hang out at the bar, we play pool and beat on each other lol, although its been awhile he was always there and vice versa.
I can understand him not talking to you but are you giving him a reason not to?
Men generally love their partners but then some woman can't deal with the whole truth or freak out on them, therefore they turn to other people. There is so many different siutiations I could give but Im just using that. You can't tell him to stop talking to your best friend, its wrong its like saying, its wrong for you to talk to her, you will have to compromise but it has to be equal.
When either party infringes on the other, than the arguments happen and it only gets worse!