Be used to + noun phrase or verb-ing (in this pattern used is an adjective and to is a preposition).

I am used to getting up early in the morning. I don't mind it.
He didn't complain about the noise nextdoor - he was used to it.

If you are used to something, you have often done or experienced it, so it's not strange, new or difficult for you.

The opposite of be used to is be not used to.

I am not used to the new system yet.

Get used to + noun phrase or verb-ing (in this pattern used is an adjective and to is a preposition).

I got used to getting up early in the morning.

After a while he didn't mind the noise in the office - he got used to it.

If you get used to something, you become accustomed to it.
It is the process of becoming used to something.

Used to + verb refers to a state or habit in the past.
It is used only in the past simple.

We used to live there when I was a child.
I used to walk to work everyday when I was younger.

If you used to do something, you did it for a period of time in the past, but you don't do it any more.

The form of the question is did(n't)+subject+use to be.
The form of the negative is
didn't use to be.

Did(n't) he use to work in your office?
We didn't use to be vegetarians.