How to feel better mentally..?

So, I feel like I don’t want to do anything with my life. I know I’m lazy. I just really don’t care about anything. I didn’t ask to be here, so why should I have to work to contribute to society..? I know that’s probably a dumb outlook, but something I wrote last night I feel like sums up how I’m feeling:
Life at the moment is like a bad movie. I really want to leave, but I respect the people who created the movie and put so much work in it to leave. So therefore, I’ll stare at the screen, but I’ll put no effort in to change my experience. I’m also too scared to leave. What will other people think? Will I miss an amazing last-second plot twist that makes the ending amazing? That’s the only reason I’ve been sticking around at this show called life right now.

Does anyone have any advice? I just feel unmotivated and not passionate enough to care about anything/ anyone.

(I am aware I already posted this, but I didn’t get many responses.)