I'm under 15 years old, I'm so disappointed in the emptyness of life and the universe. Does anyone else feel like this too? Please give me advice

I came here, because I can't say anything to my friends and family. I can't say how I feel about anything, friends and family will call me crazy. I'm disappointed in my teenager years. The hype from seeing the flood of teenagers on TikTok and instagram isn't it. Nothing is it. I don't even care about being upset about something I was just excited for, I just don't care about anything, I've been feeling like this for months now. I don't know how to explain it properly, I just feel empty for no reason, and slightly numb and disappointed. I even tried smoking weed, but it doesn't help either. I thought I was just depressed, but I'm not sure. I tried to talk to a therapist, they just told me to be grateful for what I have. It still hasn't helped me after several visits. My mom just blames my sister, because she is 3 years older than me. I've been trying for months, I just don't know where to turn to now. I have absolutely no idea what to do.<br><br>I tried to talk to my best friend about it, and she told me that I'm overthinking things. I just don't know what to do anymore. I'm just so disappointed in life in general. I wish I was interested in going out and finding friends, but I'm not. I just feel like this is it, this is life, the universe is empty, everything is empty. I just don't know what to do anymore. I'm just tired of having a lack of interest in everything. I've been having race thoughts for the past month, I just don't know what to do, I'm so disappointed in everything, and I get upset about that, because I'm disappointed in the things I am excited for, but it's not it. I don't know what I'm supposed to do anymore, that's why I'm here. That's all I know, just that I'm tired of feeling empty and numb. I'm trying to talk to someone here, because I have no idea what to do anymore. I'm trying, because it's all I can do.