<human>: Can you give me a shortened version of the text?

Hey, So my ex dumped me a while back. I did a post about it a while back, if you're interested it's [here] ( 

So after everything that has happened between us I've come to think of her as emotionally immature. She is incredibly indecisive and self centered.

Every time I make personal progress on our break up she seems to weed her way back into my life. Inviting me to her house where we'd do the exact same things we'd do when we were together, and telling she'd tell me how much she misses me. As soon as i'd start getting my old feelings back she would just completely change the way she spoke to me and acted towards me, shutting me out completely again. 

She tells me herself that she's sick of being two faced and she knows that she's done these wrong things but she can't help it and apologises every time. Which makes me think we can make progress.

Anyway, she's tuning this guy (M 23) who already has a girlfriend of 4 years and she tells me all the time that he's using her and he's a sleeze and a player. 

She's also moving to my school next year and she's already hooked up with one of my friends. 

The worst part is I know that I should shut her out of my life, and I know it would be better for me. I recognize this, but I can't help it. I'm awful haha.

I don't know if i'm asking for advice or not. I know what needs to be done. I just don't have the willpower to do it. I don't know how to shut her out of my life when she's all I think about and if there was a chance to get back together with the first girl I've ever been in love with I would. 

Maybe i'm also immature. I just hope people don't see my age and dismiss me as being some whiney teen with girl troubles.
I've really tried to approach this by myself and as adult as I can but I think I may need some help.
<bot>: My ex is indecisive about me and seems to pop up every time I start making progress with this hard break up.