I have some experience with this feeling and for me it comes from mismatched expectations. I believed that simply getting into the workforce was my goal, the proper goal, and that would be a satisfying end.
At some point in the working life some people (you!) become acutely aware that satisfaction and purpose matter. Now you have to reach outside of everything you have tried and everything you were taught to find something you actually care about.
Take up hobbies, personal projects, travel, and through trial and error find a way to connect your talents with a meaningful end.
Most importantly, you will have to solve this yourself. Friends online can't tell you what you want any better than your boss can!
Bravo.