is believing in god not about you and how you're fulfilled?

i thought you can feast on the world; have the best of everything and try fun things and good experiences, but you still would feel empty if happened.  then i thought if you help other people, you won't get fulfilled either because no one appreciates anything you do anyway.  so then i started thinking this weird thought: maybe god wants us to love people and ourselves - not in search of fulfilling ourselves but just because it's doing the right thing.  by that token, we will be fulfilled even though we're not setting to fulfill ourselves.  is this right wrong partially right???