Idk if you've read it yet but I would say it depends on what personally gets to you. I read this back when I was around 16 or so and it did impact me a lot, so I think it'd be suitable for 14+ up. I could feel empathy or at the very least sympathy for both of the mc's so so long as you try to understand the though process of both of these individuals, I believe it'll leave a big impression. Either way, it's super bittersweet and I think the most important thing bout reading through this is definitely taking your time and pace your reading so you take in all the panels!
I first read this when I was around 16. I've reread it every few years since. It still affects me the same way every time I read it. It's a really beautiful but sad story about love, forgiveness, and loss.
should i read it now, or save it for later when im older? is this one of those tragic stories that are more relatable for older audiences? cuz i wanna read it and bawl my eyes out but i feel like i wouldn't get the full experience if I'm too young...