i see where you're both getting from, but remember that everyone was telling chase not to get together with leo, since he was quite literally obsessed with chase to an extremely unhealthy amount- chase only saw a glimpse of leo being better, and since he would obviously have trust issues, especially from reading his phone (if you chose to do that, im not sure what happens if you don't), and simply being kept away from the group. i think chase did the right thing to agree to not speaking again, otherwise leo would have reverted to his previous state. if he did stay down, and not jump on a moving train, he would have been stuck with leo, and for all they know, could have been targeted because of that. everyone else would have left, and leo would have been free to really do whatever he would want with chase, due to his size.
I don't actually remember the others telling Chase not to get back with Leo!
Yeah Leo had an extreme obsession with Chase, and that truly is bad. But I feel that Leo didn't deserve to be abandoned to the depression he went through. There had to be a way for Chase to send him a message through someone else! He could have told him they weren't good for each other and at lest needed to stay apart for a while. Although getting on the train they only had a moment, Chase really should have followed up and tried not to cause Leo so much pain! Also I really don't think Leo would have hurt Chase. Yeah he was flipping out and obsessed, but under that was real love for Chase.
im not sure who else did (though i do think someone else did), im sure flynn said something about not getting back with leo, or it's a mistake, or something.
as for leo - i don't think chase wanted to, but he had to, for survival. leo didn't deserve to be left, but the group panics for a second once they realize leo didnt make it onto the train, flynn shouting fuck, for example. they didn't want him to be left back, but since leo left, with no one knowing, they didn't have a chance to bring him back. it was a matter of survival for everyone, leo just so happened to have gone through a traumatic episode in the small second, and that trumped his adrenaline to get onto the train.
there should have been a way to contact leo, but then again, we've already seen chase and how he acts when he's in an awkward situation, he becomes silent, as he did with leo when they broke up. he was young, and he uses that excuse frequently, because he knows he doesn't know how to handle it otherwise.
i do agree that chase should have said something else, but i can see why he said it! he was under a lot of pressure, pain, adrenaline and stress. he didn't have time to think, and probably said whatever was first on his mind: yes, i'll stay with you in echo, or no, i've voiced my opinion on echo.
if chase did decide to stay, leo's obsession with him was already getting out of hand, especially with the hysteria the town was going through, leo would have eventually gone to hurt chase, accidentally or 'on purpose' (because of the insanity). normally leo wouldn't, i agree with that, but the many factors along with no one to stop him, leo wouldn't have had anyone to stop him from doing whatever he wants with chase. he 100% had real love for chase, but the obsession would overrule his love.
Yeah, I understand it better now after thinking about it and reading what you and others have said.
Still I'll always think of it as a sad ending. Also I still doubt Leo would have done anything to Chase. Yeah, I get that he was not in his right mind, but he still had reasoning. just before Chase tells him whether or not it's over, Leo calms himself for a moment. Also When Chase tells him it's over, he doesn't react with with rage and start shooting, he does actually seem to let go, even if he's shocked. Now yeah Leo could have been a danger to Chase if he stayed alone with him, but I think the worst he would have done would be holding/hugging Chase too tightly and not letting go of him. Also it seemed to me that the hysteria was already calming down, the gunshots had stopped and there didn't seem to be any more crazy people running around, so I wonder if the worst of Leo's aggression was already past? I could be misunderstanding, as thats my big problem, but I still think there should have been another option.