Probably unpopular opinion: Tell the cops anyway.

This sounds like a death threat. If you get killed, people will be like "wHy DiDn'T sHe TeLl ThE pOlIcE????".

Worst case, the police don't care and they think that the boogaloo boy is cool. Best case, they do something about it and maybe keep you from dying. I don't think that the police will actually do anything, but they might, and this is life or death, so it's worth trying.

If you tell the police and they don't do anything, you'll have a good story about how useless the police are.

Everyone else's advice still applies, but you can still tell the police about this.