Why am I still here??

I am not really needed by anyone, all I  do is get in peoples way and make them feel sad.  I can't cook, whereas my bf said his ex was a great cook, I have no kids so no one really needs me or counts on me in order to live.
 
My puppy needed me. I was a bitch. I gave her away because of a man who didn't like her. Giving her away was like giving my baby away. I know it sounds silly because, like people would say she is just a dog. But she needed me. And loved me, but I sent her to live with someone else. I can't take the guilt sometimes, it just makes me want to puke. All I wanted was a loving boyfriend, which I had at first until a few weeks ago when he started losing interest, a nice flat, well I have a flat, wouldnt call it nice because I get paranoid someone will break in the moment I step out, and my poppy. Now I know we can't have everything we want, I can either keep my man or my dog. Did I make the right choice?? Would a man who loves you really ask you to give up something you love so much?
 
So really, what AM I still doing here? The one thing that needed me is gone.