I thought he was a scumbag, but he was just a boy in an adult body. Like a child he didn't know how to express his feelings so he lashed out with violence. Then he pushed her away because of the pain he caused or something, maybe he thought her happiness lay in another man's arms. While not a mature way to handle the relationship it is slightly better than what he was doing. Unfortunately for her change must come from within. If he wants her, he will need to step up and become worthy of her instead of running away.
Ok, he's a douchebag playboy & she is too good for him. But at least in the end he knows he's wrong & she is too stubborn to give up. So here's hoping they can start anew, together.
"I just couldn't reach anybody else", huh. And just like that, you know he's a bit of a douchey playboy type.
But then it would seem that afterwards, the other girls began to bore him, and he becomes strangely obsessed with her. And in the end, he decides to let her go by telling her that she doesn't have to come to him anymore if she doesn't want to.
Perhaps that was his way of trying to be nice to her or something, but he's clearly attached/obsessed with her, and that ending, where he had evidently re-read her note and messaged her to come over...She actually listened. She clearly still loves him even after he uses her like this, and I think slowly but surely he's beginning to notice her, and maybe reciprocate a little bit, even if he tries to deny it.
It's very hard to make out, but the time stamp on the messages on the phone on the last page says, "One month ago". He didn't ask for her to come over then. She just did.
If that's what you were getting at with, "She actually listened" - that she stopped coming over - then I apologise. I just seemed to me that you missed that detail. (Again, it's very hard to make out, so I wouldn't blame you.)