Advice

So my best friend always seems to be close with the guys I like/ mess around with, after I tell her I like them. She seems to always Snapchat them or text them. I “joke” around with her saying “oh you can talk to them” and she’s like no I don’t like them, and I know you like them and I wouldn’t do that to you”. But each time we are together I see her talking to them and each time we go out she’s always flirting with them. What am I supposed to do because I’ve falling so deep in liking this guy but I can’t be worried my “best friend” is gonna still flirt with him when she’s drunk