I broke up with my girlfriend

Eleven days ago, I broke up with my girlfriend of eight months. Making that decision was incredibly hard, but it was something I had to do for my own well-being.
Throughout our relationship, I was hit with one severe hardship after another. Near the very beginning, my mother went to jail. As a teenager, I suddenly had a massive amount of responsibility dumped onto my shoulders. I was forced to step up, be the man of the house, and take care of everything.
A couple of months later—on top of all the daily stress I was already ignoring—I lost my grandfather. He passed away in March, just two weeks before my birthday. I tried to suppress my grief and didn’t fully process his death. Around that time, I began to struggle severely with my mental health, developing a poor relationship with food and a deep hatred for my own body. I tried my hardest to keep pushing forward because I felt I had to be strong and handle it all like a man. Above all, I tried not to burden my girlfriend. I tried to keep talking to her, reassure her, and make sure she never felt ignored.
However, when I tried to open up to her, I didn't get the support I needed—the kind of comfort I was used to getting from the women in my family. Instead, I felt like a burden. When I told her about my mom in a moment of vulnerability after we hadn't spoken for a few days, I didn't get a real reaction. I didn't even get a hug until after I had to explain myself for why I was acting distant. It felt like she only hugged me because she finally felt okay, not because she genuinely wanted to comfort me. I couldn't consider that real support.
Looking back, I realize that when my grandpa died, I hesitated to tell her because my subconscious already knew she wouldn't support me. And it was true: when I finally gathered the courage to tell her, she didn't comfort me. She was cold, barely acknowledging it beyond asking, "How do you feel?" She getting mad at me for being distant or sad hurt, but I didn't want pity—I just wanted someone to talk to. I didn't have my mother, and my older sisters live in a different country, so I was completely on my own.
Even while battling these mental health issues, I still had to be the man of the house. I ignored our relationship issues for a while, and things seemed okay temporarily. But then she started expecting me to be a "normal" boyfriend—wanting to go out and do things together. Mentally and physically, I couldn't do it. Financially, I couldn't either; every dollar I had went toward buying food for my little sister and keeping the household running. When I tried to explain this to her, she just couldn't understand what I was going through. My love for her blinded me to how bad things really were.
After the school year ended, we grew distant. We only saw each other once. Then in July, my grandmother—one of the women I was closest to—passed away. Deep in my grief, I reached out to my girlfriend to let her know I had to leave town to be with family. Even though we hadn't been talking much, she was still the woman I loved, and I hoped she could be there for me.
Her response was what finally opened my eyes to her complete lack of emotional empathy. It took her an entire day to reply, and all she wrote was: "Oh... umm. Accompanying you."
I didn't even know how to react. This was one of the most important women in my life, and my girlfriend couldn't spare a few minutes to write a thoughtful message. Throughout our relationship, I had always gone out of my way to communicate and be better for her, no matter what I was carrying. When I asked her if she was serious, she didn't even see the problem, asking, "Well, what's the problem now?"
In that moment, my feelings for her completely shifted.
I spoke with the people closest to me, and everyone gave me the same perspective: she either didn't truly love me the way I loved her, or she simply wasn't capable of it. For the sake of my mental health and my life, I needed to let her go.
It was really hard. I felt like a coward for doing it over text instead of in person, and I admitted that to her. But I explained why: her lack of empathy during the losses of both my grandparents and through everything with my mother left me feeling completely unsupported when I needed comfort most. And the only gave me reassurance about my grandmother passing saying she was in a better place and that she loved me and Joe’s I make her proud at the end of the breakup conversation, which I didn’t understand.
I still miss her, and I still care about her and love her. But I am mature enough to recognize that people rarely change emotional maturity levels overnight. Ending the relationship was the best choice for both of us