Rumours &a catfish

So some guy I rejected several times (I wasn't into him and he groped me more than once), decided to catfish me and threaten me. And he was pretending to be this girl that I didn't like so that I would assume it was her, but it was so obviously him. Because he was texting with a lot of slang and grammatical errors for someone who supposedly has been reading books since "she" was three. and

And like it's so aggravating how he can just say this stuff after I have clearly stated that:

1. Just because I'm bisexual it doesn't mean I'm promiscuous.

2. just because I say I would marry my best friend it doesn't mean I want to have sex with her. I literally love her in the most platonic way.

3. I'M NOT INTERESTED IN YOU (HIM)

Any thoughts or advice?

(btw I'm going to be a senior in September and he already graduated)