There are many reasons why a person might lose interest in activities they once enjoyed. If you want meaningful responses from us, it would be helpful to provide more meaningful information.
That said, anhedonia refers to more than just “lack of interest.” It refers to an inability to experience pleasure, and is more frequently associated with physiological pleasures that are more-or-less intrinsically pleasurable for a physically healthy person. The pleasure from an orgasm or eating a tasty meal, for example.
It is possible that you are depressed, but again, we have very little information to make much of a reasoned assessment.