Why did our 10-year relationship fall apart?

i was in a 10-year relationship where communication was always our weak spot especially with hard emotions. i’d shut down and avoid things and she struggled to express her needs too so nothing really got resolved it just piled up.
she ended it even though it hurt her because things weren’t working anymore and my depression was starting to affect her. after the breakup she became distant and sometimes speaks about us more negatively which feels confusing but might just be how she’s coping.
at first i blamed myself for everything but with time i see it was a pattern we both played into. i know i could’ve shown up better emotionally but i also know i couldn’t have fixed it on my own.
since then i’ve been working on myself in a real way actually facing my emotions opening up growing in ways i didn’t before. part of me still feels attached and hopes maybe there’s a chance someday but i also know it would take both of us changing.
right now we’re not in contact except for one practical meeting in the future. i’m focusing on my growth even though a part of me still hopes she might notice that change and maybe reconsider.
i just don’t know… is there still hope here or is it time to let go?