I was the one who told you about Say I Love You ;)
You know, what irks me is that future Naho said that "even if Kakeru were still alive, I'd have married you, Suwa." And now we get this open ending
There are comments saying that they are glad that both Suwa and Kakeru got to get their girl... I dunno why, but this open ending and this message rubs me the wrong way.
Oh sorry for forgetting 
Yeah, I thought about that too ! Why did she say that ? I don't remember well if she knew in the "first world" that Kakeru loved her too !
I personnaly think that it wasn't really an open ending, since they said to each other their feelings, and Suwa's feelings were put aside, so for me,it would make sense that Kakeru and Naho ended together instead of Naho and Suwa. But the sentence you mentioned makes things more complicated, even though, Suwa and Naho didn't seem really "that happy" in the first world,since it felt like Naho was still in love with Kakeru.
I hope you guys don't kill me for saying this, but am I the only one here who thinks the ending is good.
I mean don't get me wrong I can see what ya'll are talking about, and I'm not saying it's the best ending ever, but I see more pros than cons with this ending than.. You know.
Nobody will kill you for giving your opinion
I don't think it was a bad ending, in the contrary it was a good one, but I, and some of us here , were expecting something better, because it COULD have been so~ much better. I didn't feel that happy about them saving him or that sad about the manga ending, I was just...idk, it wasn't that satisfying.