I feel empty

Idk what's wrong with me. I'm usually a happy person. I'll have sad moment but then it goes away and I'm fine. But lately, the sadness won't go away. Idk if it's from the constant rejection of not feeling wanted has suddenly started to take a toll on me but I feel empty inside. Like the love that was inside me has died. I know I'm loved and I know I have family and friends who care about me but I've been feeling lately that it's not enough. I don't want to feel this way anymore but I can't help it. Idk what to do anymore. I feel I'm at crossroads with myself.