I Fight Depression and Loneliness Everyday

I remember listening to Alicia Keys' "Un-Thinkable" taking my bubble bath with thoughts of a guy I was seeing at the time. I felt like I had found love. But I hadn't. I think about "him" sometimes, but that wasn't love either. But it was the closest I had ever gotten to some sort of intellectual relationship. I don't know when it happened, but I stopped caring about myself. I didn't realize it until just a couple of weeks ago. I don't look out after myself. I don't take care of myself. I need something to live for again. I don't have anything. Every day is a struggle with depression and loneliness. Am I worth anything? Is there any value to me? What do I do to fight for myself? Is it too late to fight?