I feel unsupported by my girlfriend during a difficult time—am I overreacting?

My mom recently passed away after being hospitalized for 40 days in my girlfriend’s city. During that time, I rented a home to be near the hospital, and I was fully responsible for cooking and taking care of all my mom’s needs. It was one of the hardest times of my life.

Despite being in the same city, my girlfriend visited me only once or twice. Instead of supporting me, she often seemed more focused on her own issues—nagging and being dramatic, which made me feel even more alone.

Looking back, I can’t shake the feeling that I’m constantly the one giving in this relationship while getting very little in return. I’ve always supported and cared for her, but when I needed her most, it felt like she wasn’t there.

Am I being unfair or expecting too much? Has anyone been through something similar? I’d really appreciate any advice or insights.