Just when I think everything is okay

I was doing so good. I was happy for a good few months. I was stressed but handling it well. It was the first time I had been happy in years and now here I am. Sobbing on my bed thinking about how worthless I am, covered in self inflicted bites and scratches and bruises, telling myself that I will be alone forever and that no one cares just to be proven right by someone that is supposed to love me no matter what. The person that sees me in a bad mental state and chooses to ignore it. The very same person that sent me spiraling. And here I am blaming myself for everything. Ranting to strangers on the internet that I will never really know. Pushing my problems on other people that are also struggling. Making things worse. As always.