So things are finally smoothing over with my boyfriend and I and are finally settled and happy. However his best friend who is a girl is in the picture! Usually I wouldn't have anything against my partner having a best friend of the opposite sex, but this female I really can't get a long with. We have nothing in common and when we are alone it's so awkward she doesn't even pay attention to what I have to say she just looks around the room and looks dis-interested, but when it comes to my boyfriend and he comes back into the room she pretends like she is been nice and interested, but then starts been all down so my boyfriend is like what's wrong and pays attention to her and gives her a hug etc. I tried to be nice to her but if she bluntly ignores me why should I even bother, a while ago she mentioned something to my boyfriend that I told her and completely changed the story and my boyfriend was very angry at me about it and started calling me a liar etc I was so angry, that he automatically believed her over me he said he has known her for longer. That really annoyed me because I feel like no matter what happens he will take her side because they have known each other longer. I know my boyfriend won't leave me for her because he isn't interested in her in that way he only sees her as a friend, however I think she isn't too happy, she wasn't happy he got with me in the first place she told me to my face when my boyfriend wasn't around that she told him not to bother with me because I supposably couldn't make my mind up whatever that's supposed to mean. He spoke about me a lot to his best friend and she probably got sick of hearing about me especially IF she has feelings for him. I feel sorry for my boyfriend because I don't want to make him upset I have no issues with his other friends I get a long with all of them just don't get a long with this one. I really have tried and my boyfriend sees I have tried and I think he is happy that I'm making an effort but, now that she is starting to tell him stories that aren't true it's causing tension in our relationship I don't want to see her anymore but I don't want my boyfriend to be even more upset that I'm being rude. I have told him straight that, that's not the real story it's all bullocks what she has been saying and I think that made him more confused as he didn't know anymore who to believe (which is understandable) you know when you meet someone for the first time and you know that you won't get a long with them no matter what you try this is one of those situations. She told my boyfriend that I seemed to be real fake to her and that I was trying to impress her, don't know where she got that crap from as I was myself I don't change for anyone, then out of nowhere she was praising me to him only reason she was doing that was so that my boyfriend didn't go hang on a second she's picking on my girlfriend. I'm worried now that if she is around or my boyfriend pushes me to meet up with her that I won't be able to talk freely as she'll go behind my back and start telling my boyfriend other stories and then I'll have another argument with my boyfriend. How can I avoid her or get her out of the picture? Im sick and tired of feeling like the 3rd wheel when us three are together as my boyfriend pays more attention to her and talks to her a lot more, they have their own personal jokes and nicknames for each other and when it's just us three she always keeps talking to him, at one stage it got to a point where I just moved away from my boyfriend and it took him almost 30mins to realize I wasn't next to him and when he did realize and asked what's wrong I told him well it seems like you don't need me around anyway (yeah I know probably not the best move) but I couldn't bite my tongue anymore. I'm not a jealous person as my boyfriends other girl friends aren't a problem, but this girl really makes my blood boil I'm worried that it will get to the point where I'm going to lose it and say things I shouldn't and lose my boyfriend I love him and I won't let anyone get between us friend or foe and so far this girl has been all sweet to him about us to his face but to me the complete opposite. How can I go about this entire situation without upsetting my boyfriend? 

Sounds to me like you need to have an actual open, honest conversation with him. Tell him everything you just told us. If he can't bring himself to believe that, then you are of no value to him, and that is no way to have a relationship.

Hey thanks for your reply. I have told him except I haven't had the chance to tell him about his best friend being like this to me, he is pretty understanding there's no problem between me and him just me and this girl I can't tell him he can't see her anymore because that won't solve things just make the matter worse. I just really don't like her, I'm waiting for her to stuff up again before I say something as that will be the final straw

Hey thanks for your reply. I have told him except I haven't had the chance to tell him about his best friend being like this to me, he is pretty understanding there's no problem between me and him just me and this girl I can't tell him he can't see her anymore because that won't solve things just make the matter worse. I just really don't like her, I'm waiting for her to stuff up again before I say something as that will be the final straw

Communication is key in any relationship. Be open with him, and express your feelings, otherwise he won't have any clue.

Best of luck!