My minecraft world feels worthless to me now?

Challenge yourself. I'm a girl and personally love minecraft. You could try something new, build a farm? Haha You could do some challenges. I'm not really sure.

Get a real life? I'm a girl gamer, but y'know, the virtual world can never replace the real world. Eventually you'll need an outlet from the virtual world that only a life partner in the real world can satisfy. Invest in some real life hobbies and challenges to overcome. Like finishing a dirt bike race.

I get bored on single player pretty easily also. I usually play multiplayer now, but I know I should find better things to do than minecraft. If you think you exhausted any challenges or fun things to do, maybe you should find something else to do.

You should try going on servers or creating things with redstone on a flat world.

Install MODS or play mini games on servers