How to cope wirh depression and anxiety.

My life is pretty fucked up. I don’t know who my real dad is , I’m adopted , my family uses me , I’m bullied , I don’t know why I have a boyfriend, and I have been disowned by my sisters family ( who I thought where my family ). I’ve gone down the self harm route and my sister and step dad helped me through it all. I’ve gone down being anorexic. Any advice so I don’t end up doing anything worse.