My Exes Girlfriend. -__- Help ?

[Tsukasa Higurashi]

Okay, Hi. I'm 16 and This girl is 13.

Okay, My ex he loved me, so i thought, We were together 2 years.

He left me for her but he continuously goes on my facebook, message me saying he misses me & he still loves me. I just ignore it. & I finally blocked him so he can stop.

3 weeks ago this girl followed me on twitter and then was doing sub tweets towards me, saying

im no one, i need to get over him, im ugly, trying to make me jealous saying he loves her and stuff.

I'm waayyy over him!!


So i DM'd her saying "Are your little tweets about me? " & she blocked me & unfollowed me.
but she can still see my profile & i can still see hers and she keeps hating on me.

Idgaf really but is this something Insecure girls do? Is She Jealous of me ? Is he saying stuff to her?
What's wrong with her?
What do you think?
You're all absolutely right. And To Fire Born. I would but she hates me so much its stupid.