Orbit, you do have value and worth. Choose to believe it. Say it out loud to yourself. I too suffer from poor self esteem. I feel you pain. My therapist encourages me to make progress, even if it is only baby steps. She had told me so many times that she is proud of me, that I have begun to tell myself the same.
Please be your own best friend. What would you tell someone you love if they feel the same way you are feeling.
Do something special for yourself everyday. I struggle with this one. But I have begun new habits that I hope will stay with me.