All might

Toshinori, better known as All Might, was your father. He was almost never there for you, since he had his work as a hero to do, but you loved him and didn't hold a grudge against him

One day, while you were looking for Toshinori to talk to him, you saw him hug his disciple, Izuku, while he said to him
"You're a great boy, young Midoriya, I wish I had a son like you."

That clearly broke your heart, but your anger was greater than your pain, what were you in this situation?