realizing
v.v. becoming aware of a fact or situation that you did not know before. It is that 'aha' moment when you suddenly understand something clearly.
v. achieving a sudden awareness or clear understanding of a fact or situation. Also used to describe the act of making a plan or hope happen in reality.
I am realizing that I left my keys at home.
After looking at the map for several minutes, she is finally realizing that we took a wrong turn.
By realizing his long-held ambition of opening a gallery, he not only fulfilled a personal dream but also revitalized the local arts scene.
The verb is transitive and takes a direct object. In its sense of 'becoming aware', it is often used with a 'that' clause.
I am realizing of the problemI am realizing the problemRealize is a transitive verb and does not take the preposition 'of'.