Looking for some advice on how to continue?

I got a lot of stuff soaking in my head right now. A lot of realizations, like that I'm not happy as I used to be, I don't care about people as much anymore (I'm drifting away from my parents) and I'm almost incapable of enjoying things that I used to enjoy. It's like as if I've developed a "behind the curtains syndrome" type thing where I can't enjoy things at face value anymore, and I constantly judge and critique it and I constantly think about the people behind the movie or show or game or whatever and think about the poor job they've done and how they could have done better, even though I know I couldn't have done it better myself. I have become cynical and jaded inside. Like for example last year when Star Wars came out, it was blowing my mind. Beyond excited. Now this year I could care less for the new movie, just like everything else in my life. I know that seems small, but that same passive feeling has transitioned to everything else in life as well. I've lost emotional connection to things. It's like everything is passive for me. I honestly am just looking for some wisdom or some advice from anyone who has something similar going on with them. I realize that, 16 years of my life have been enjoyable, and this one year was total shite, so it's possible that hopefully I can find that spark in myself again. There's this idea I have in my head that I'm turning into an adult (2 months from 18) and it's normal that I'm seeing things in a different light, that I'm losing passion, excitement, and love for things in my life, but I don't want that man. Instead of being excited for things in my life (entertainment, opportunities) I'm dreading them because I know that I could be in a happier place, and I don't want to spoil the experiences now because if I do that, when I get happy they will have already passed me.

We do not diagnose so I don't know what it is you could have because I'm not a trained professional.

I've experienced a lot of what you share. I lost interest in everything in life. That vitality was gone. I'm so sorry you are experiencing this at such a young age. I have Bipolar I and for me my ups and downs can be short-lived or long. I have mania's which can be either a short span of time or long (when not medicated) and my depressions are bad too. What you share, for me, after seeing a doctor, was when I was diagnosed with depression. Later I was diagnosed as having bipolar. I encourage you, if you're not already seeing a doctor, to go and make an appointment. You don't have to suffer like this. Hugs if wanted.

Thank you for the reply, I am considering going to see a therapist actually if it can really help me feel happier like I used to.