I don't know whats going on...

I am going crazy. It seems like everyone is changing, even me, and i hate it. I don't want to change, i don't want to be this way, but it seems like i can't change. Im pushing away the only person ive ever cared about. Im losing the one thing in my life that keeps me alive. I don't know what to do. I don't know how to fix this. Im going to try to change, but i don't know if that will fix this. I don't want to lose her. I feel like ive failed her. I designated myself the job of keeping her happy, making her feel like she's worth something, and i have failed. I don't know what to do