Grief is so complicated and manifests itself in strange ways, please go and see a therapist, I think it'll really help you to learn how to cope with this loss. It's not going to happen over night, but with time you'll learn to remember your baby without feeling all this self hatred and resentment.
You do deserve to be happy and you deserve to live a life filled with love ans success. Don't deny yourself these things because of misplaced guilt, because I'm sure that your baby would not want his/ her mommy living a half life.
Of course you're going to feel lost because nothing is going to replace your little one. Allow yourself to grieve, allow yourself to cry but then give yourself permission to begin healing. You cannot live your life blaming yourself for something you had no control over.
I am always here if you need to talk.
Much love, Evangeline xoxox