Being is a word that can be hard to master for English as a Second Language speakers. It can be used as a gerund, or in present or past continuous tenses.
In a present or past continuous tense, being says that it is happening now, or was happening before, in a continual manner.
He is being nice.
She was being bad.
You are being good.
They were being mean.
I am being patient.
Being can also be used as a gerund, a word that acts like a noun and looks like a verb.
Do you like being a student? ("like" is the verb, "being" is a noun")
Being a teacher is fun. ("is" is the verb, "being" is the subject)
I enjoy being nice to people. ("enjoy" is the verb, "being" is the object described as nice)