can i confront the girl who keeps texting my boyfriend?

my boyfriend and i have been together for 6 months but there's this girl he used to hook up with a year ago who seems like she's obsessed with him and won't leave him alone. he has her blocked on snap, instagram, and even blocked her number recently, but even after he has told her multiple times since march to leave him alone and that he's not interested in talking to her, she won't stop. she even found my VSCO a couple months back (i have no idea who she is, we have no mutual friends) and FOLLOWED me on it. i've been extremely tempted to text her (got her # from my bf before he blocked her) and tell her to stop trying to contact me/my boyfriend, but i don't know if it's a good idea. should i? i don't know her at all if it matters, we've never met or spoken.