Friends forever ... Face whatever ?.

Today I had my bff's birthday party but it wasn't what it should be. I have to say that my bff is a boy, he's one of my closest friends since we both had sixteen years old, now I have twenty one and he has twenty two. We have the best of the friendships that someone could ever wanted to have, we know each other so well, we have the same interests and think the same way, when we're together most part of the time we spend it laughing. I love to spend my time with him or used to 'cause now we have a problem, he has a girlfriend since August of 2008. I don't have anything against her but apparently she has something against me. She doesn't allow him to speak with me or to spend time with me, he does it anyways but it's not he same, we don't have the same friendship and it husrts so bad. Now everytime we went out there are certain things that we can't do like take photographs holding each other or gives us a hug, thing that we usually did. We have boundaries now and I don't like it. And today we were like two strangers. Every time he came closer to me there she was, watching us, watching what we were doing, we couldn't took more than two photographs together, 'cause there she was doing that face like ''stay away from her''. It was so uncomfortable and painful. I was and am so mad with him and I even thought about just don't talk to him anymore but why should I do that he's my best friend I can't do that, I love him so much, I can't stay away from him. He's my best friend why should I stay away ?, I can't find a reason, it's not fair. She has to learn that we were friends before she was his girlfriend and she has to accept it. Just stop to put him boundaries, you're not his mother or anything like that. I can't stand that kind of people. If you really love someone you want the best for that person and friends are one of the most important things in everyone's life, you can't choose his friends or take friends out of his life just like that. It's all about trust and if you do that you're not trusting in that person, so why are you with someone you don't trust, it's crazy. I'm so mad and hurt right now. Mad because of her actions and her requests and hurt because the change of our relationship. I'm not asking her to like me or talk to me like if we were friends, 'cause I don't need anymore friends but to respect me as his boyfriend's friend, just like I respect her. I think it's not something impossible to do.