Boyfriends best friend

I love my boyfriend but he has this one girl friend of his that has a major thing for him and has for a long time and every time I'm around she gives me dirty looks. She also doesn't  know that I'm close with some of her friends and I know she talks shit about me to them saying I'm a bitch and other stuff. I know he dosnt like her and never has but every time we're all together I feel like I need to hide my feelings for him because I don't want to hurt her and I try supper hard not to but "us" in her face but there's just something about her that every time I see her I just kinda wanna hit her with something because this is my boyfriend and I shouldn't have to hide my feelings just to please her and she should just keep her stupid bitch faces and comments to herself because it makes you look bad lol please tell me someone else knows how I feel and that I'm not just crazy