Roommate using my razor?! 🤢😡

So this morning I went to shower and noticed pubes all up in my razor 🤢 I know for a fact these pubes aren't mine because the only thing I've used my razor for the past week or so is shaving my pits and let me assure you, my pit hair is not a quarter of an inch long lmao

But it's so gross to think a roomie used my razor on her pubes. The worst part is I have genital herpes and have used that razor on my lady bits before. I'm at the point where I think I know who it is but I know she's not gonna come forward on her own cause she has severe anxiety and is afraid of being in trouble. So I'm wondering if I should go to her boyfriend (who is also a friend of mine) and tell him what's going on? Or would that be pushing it too much? Help a sister out!

edit: for those of you saying it would be bad to tell her bf, how would you feel if a friend of yours knew your partner possibly contracted an STD and didn't tell you? You'd probably be upset... it's his health on the line, too. And they've been together for years so i doubt itll be a big deal. Chill lol.