QUARTERLIFE CRISIS!
just kidding...
I can't say I know exactly how you feel as I have never felt as though I'm am just an after-image of the actions of the people closest to me. If this is how you feel try doing something completely new. Something that isn't inspired by people around you but an interest that is truly desired by you and no one else. Or you can try to do something a little different than you usually do. Instead of running you can try riding a bike, Instead of reading you can try an audiobook or a podcast, instead of making the same old dinner you can try to adopt a child. (don't adopt a child).
Trying to fit into a paradigm that is expected of us can put us into a box. In this box, we feel we have to act a certain way or we might be shunned from society or even those closest to us. Some of us are excellent at fitting into this box, my wife for example. but some of us just can't seem to get it right.
I have realized that this box is going to stay there no matter what we do to it. The expectations of society are not going to go anywhere, but it is our choice to conform to it or not.
I have stepped out of this box and can tell you that it is an extremely liberating thing to do. I have sneaked into a strangers' house without them knowing, I have danced alone for a crowd at an event on stage without permission, I've run down the street in nothing but my underwear. I'm not exactly going as far as satanism and cannibalism, but slightly deviating from what those closest to me expects from me makes me feel like my own person and that I am in control of my own life. This might seem stupid to them, but it does my psyche a world of good.