Should I breakup with my boyfriend if hes being werid with his girl bestfriend and he doesn’t know that I know?

Me and my boyfriend have been dating for about 2 months. Even before we officially got together, multiple people warned me about his girl best friend and told me she's literally obsessed with him. I ignored it because I didn't want to judge her without knowing her.

Now it's getting to the point where she's making up lies about me, and I'm hearing it from other people.

It's making me really uncomfortable, especially because I know how much influence she has on him.

The problem is I can't even bring it up to him properly. I don't want to throw my friends under the bus by saying where I heard things from, and I have no "proof". The first time I tried bringing her up, she made him tell me to apologize to her because I was talking bad on her name to my friends.

I also have guy friends, and I already know he'll try to use that against me, but my friendship with my guy best friend is NOTHING like what they do, we are in the same friend group.

He's sneaky about her, and she says "everything she does is to respect our relationship" but that's just not true. They have "group chats" that are literally just them so they can hide contact. He doesn't call me on the phone because he's on the phone with her. There's so much more too.

I feel stuck. I really like him, but I genuinely cannot deal with her anymore, and I know he's not going to cut her off. At the same time, I don't want to break up with him and completely blindside him because he thinks everything is going well.

What do I even do in this situation 😞 This is my first real relationship and I don’t know how to handle this and or break up with someone