From the point of view of our own psychology, yes, we do create our own reality with our thoughts and our attitude. But it is not true that reality is created by us, reality is there, either if we exist or we don't.

The human race could cease to exist like dinosaurs ceased to exist and reality will continue. Unless you understand reality as the interpretation we make in our brain of the universe, in which case that kind of "reality" is created by us, but is not really a reality in the first place, but just our interpretation.

So what is reality, we are just starting to learn about it, we need to conceptualise and simplify in our brain reality so we can understand it. For example we see colours and touch objects but in fact we are only detecting with our sensors (eyes) electromagnetic waves in a quite narrow wave lenght (light) and "touching" is the consequence of the quantum behaviour of the parts of our sking and the object, in other words touching is the result of the interaction of the quarks and gluons out of which we are made of with the quarks and gluons that we are "touching". In fact the concept of "matter" is very misleading as it is nothing "solid" but only the result of the interaction of the quantum fields.

So in resume, yes, we alone are 100% responsible for everything that happens to us (self responsibility vs. victimism) our thoughts and attitude has an effect on what we achieve because of physiological and social conditioning. It can also modify how we interpret reality in our brain, BUT we do not create reality although we are part of it and can modify it with our actions.