What would you do if they blame everything is because of you?

Just recently, my girlfriend told me that she regrets her decisions because of me. I feel like I’m the only one who is truly invested in this relationship, and I’ve become desperate. I want to change myself and stop being this way, but no matter how hard I try, I can’t seem to.

I’ve tried explaining everything to her, including how depressed I’ve been, how I stay awake at night unable to sleep, and how much my thoughts consume me. But even after telling her all of this, I feel like she doesn’t understand me. She mostly talks about herself and never seems to care about what I’m going through. Instead, she simply tells me, “Because of you, I’m like this

Tbh, we had a small conversation where I spoke harshly to her, and I admit that was my fault. But the truth is, she didn’t even seem to care about how I was feeling. I was only trying to tell her how I felt, but somehow, it ended up turning into an argument.