Just typing whatever comes to mind, don't read it if you are looking for comments to help you or tell you what's going on but I remember when I was younger even trivial things used to make me happy like seeing my friends or getting ice cream or things like that now everything just seems like time passing, I used to have a lot of hobbies when I was younger more active hobbies maybe, now I mostly spend time online, I feel like this is what it's like to grow up things just aren't as interesting anymore, but I still do feel truly happy sometimes, sure watching a TV show or something like that won't make me very happy, things like my dog being excited when he sees me makes me very happy, I may not be very special or interesting but I still have someone who loves me unconditionally. I think you just need to find something you like, none of the things that old people say like force yourself to try new things but somewhat similar you can try things in the comfort of your own house browse online maybe read a book or play a game or do something related to a different topic, and once you're truly interested in something go deeper into it I guess, then again I'm just telling you what I think, I may be suffering from depression too like the other comments say.