Not sure what that ending was about. Why did she want to separate from him so much? Why did she think
he wanted that? And turning himself in at that point just felt shortsighted, as it was implied he had already turned over a new leaf and only benefit from doing so is to remove the paranoia (can't even assuage any guilt that way as you can't atone in jail, but he could've if he remained free).
i was expecting the kid to die so the ending is more of a pleasant surprise than i thought
I was expecting him to report the kids circumstances to cops, preferably in a way incriminating himself as a robber (like getting a cop on patrol in person due to lacking a phone, or after he got hit find a police box and collapse at their door with the kid who then says everything - in this ending he could have died too). My pet ending was the kid dying when he found her there though (so yeah, kinda expected same as you for duration of that page), and him getting a cop as revenge not caring he gets caught too (or rushing as he hopes they can save (which would be why he doesn't try to do it anonymously) her but they arrive too late).
Well, before it was revealed the kid was bullied, I also half-expected her to be some kind of ghost from a dead body he never noticed back then, and he would find out in one of three ways at the end as a twist.