being a billionaire.
saving as many people as possible.
being famous.
owning a Ferrary.
having a family and two kids.
changing the world.
discovering the cure for HIV.
being happy.
Success is whatever you want it to be. We are all different and success is different for each of us. You might define how successful you are by a lot of different things. The only way to judge if you are successful and how successful you are, is by comparison with what your definition of success is.
Stop taking other people’s definition of success and comparing yourself to that. You can be successful without even knowing it, but miss it by trying to be successful by some other person’s definition of success.