I hate my life. This has gone beyond teenage mood

I hate my life. This has gone beyond teenage mood swings and sadness to full blown depression. I wonder if other teenagers go through the same thing or if it’s just me. I constantly feel ignored and alone. I have a ton of friends and family but I feel all alone. And I can’t talk to anyone about it because they wouldn’t understand. They’d just think I’m crazy. Maybe I am crazy. I feel so empty and worthless and the worst part is that I don’t know why I feel this way. I don’t have the best life, yeah, but I definitely don’t have the worst.
The things I love doing don’t appeal to me anymore, they just make me sadder. I spend most of my time daydreaming about the perfect life I could have which in turn makes me despise the one I have now. I hope this is just a phase that will soon pass because I hate feeling this way but I can’t help it.