Feeling like a failure and alone

I realized that nobody has ever actually believed in me. They’ve made it clear that I can’t do anything that will ever amount to anything. Right when I thought I was doing fine, I realized that I’m not doing anything. My friends abandoned me because I’m a dead weight. Now my only friend is my mom. Nobody has ever said “I’m so proud of you” to me. I have never known what it’s like to not be used or abused in a relationship, there’s nobody there that would ever love me or beleive in me either. I’m convinced that if someone says they beleive in me, they’re lying. Why would anyone beleive in me?