Can you anticipate joy, if you are planning to meet up with friends or watch a movie or read a book; does thinking about the activity lift your mood even a little?

When you think back to happy memories do you feel happy, do you remember what the sensation of happiness felt like?

Not a professional and none of this is diagnostic one way or another, but it's probably worth checking if you have exhausted or outgrown a hobby which just means you need to find more things you enjoy even if it's just to add variety to your week. Or if your ability to feel joy itself is failing, in which case you probably need to a professional