Sounds like maybe you're lacking much of a sense of purpose & meaning, like why are you doing the things you're doing, what mark are you leaving on the world, what makes your life meaningful?

I don't know what you do for work, but is it something that makes you feel like you're making a difference in the world, or where you feel a sense of vocation? Is it a job where you're working towards a future career goal you really want? Or is it "just a job"? Obviously when you're early in your career it's pretty common to just be doing something that earns you money, and at least you say you enjoy it so that's better than a lot of people your age! So I'm not necessarily saying "quit your job to do something more meaningful", but thinking about what you want from your career in the long term and gradually working towards that would probably help you feel a bit more of a sense of purpose, like you're actually aiming towards something.

Have you considered volunteering? Doing something to help others or make the world a better place would probably be another way to give you a bit more of a sense of meaning and purpose. Look at what's going on in your community and see if there's any causes you feel inspired to get involved with. Alternatively, how about turning one of your holidays into a volunteering trip? There are organisations that organise stuff like this, and it doesn't necessarily mean a big commitment where you stay somewhere for months and build a school in Africa or whatever, there are trips you can do for just a week or two. Could be a much more memorable & meaningful experience than a week on a beach or whatever!