My girlfriend just confessed that someone (her best friend) has tried to sleep with her and made multiple attempts for the same at their common night shift.

Coincidentally this was the same night that she didn't message me a single time, where she used to all the time. This happened a week ago.

Let me give more details here, She is an intern and she had a night duty. He called her and asked her multiple times to come near him and mentioned to meet up after the resident goes away. She told me that she played dumb as to what he's meaning and he kept asking her to "help" him. She told me that she mentioned to him that she cannot sleep there and he told her that he will give her "company". She told him that she was sleeping somewhere else and she slept somewhere and was shocked to see him standing there telling her that the PG has left and she could come.

Here is where her story differed twice, First she told me that he was reminiscing their friendship and second, she told him no and he just went away.

Another factor here is, She didn't message me once that night, which was rare as she did even when she had a blue code (heart attack patient) and I was grinding her about that.

She mentioned that she was very happy to have me, who does sex with love rather than with lust and how I care about every small pain she has and make sure she's comfortable.

She told me that after I told her that she didn't remember me at all that night and she was remembering how smooth I am with her in sex, and she realized this after seeing a marital rape case come in.

She previously told me she was there and was without sleep and now you told me you slept, and she mentioned that she went to tend to that case to escape from her best friend.

She confirmed that she didn't sleep with him and was avoiding him lightly since, not actively messaging him.

But she told me that she was acting dumb towards his intentions and don't want to let go of her 3 yr friendship like this.

It frustated me but I chose to trust her and made her promise that if anything like this happens, I should be informed asap (after her own processing).

So this was day before yesterday and He's still reaching out after that happened and asking if she's doing ok and Idk what else (that's what she told me) and she's avoiding but still talking like it's ok, like telling him that nothing's wrong.

I was told that he was making a move on her then and she was avoiding him for that, and she even talked with him saying that everything is alright.

But now that she told me this today, I've kept my trust in her but,

I've asked her to message clearly that she has a boyfriend and she didn't like how he approached her but she's hesitant mentioning that,

1. It has been too long since that happened

2. She didn't want to break up the friendship like this

3. She'll see his face at work anyways

I've told her that I'll break up with her if she doesn't message him and block him, am I wrong here?