Used to: Past habits and states that changed

Used to + base verb describes a repeated past action or a past state that is no longer true or no longer normal. It often creates a contrast between the past and the present.

Examples

I used to walk to school every day.

Walking to school was a regular past habit.
Mina used to live above a bakery.

The sentence describes a past state that has changed.
We used to spend every summer by the sea.

The action happened repeatedly during an earlier period.

Used to vs. be used to

Used to

I used to wake up early.

Waking early was a past habit, but it is not presented as the current routine.

Be used to

I am used to waking up early.

Waking early is familiar or normal for me now.

Used to + base verb refers to a past habit or state. Be used to + noun or -ing form means that something is familiar and no longer feels unusual.

It describes states as well as repeated actions

Used to is not limited to visible habits. It can also describe past situations, feelings, possession and existence.

She used to believe that the house was haunted.

The sentence describes a past belief, not a repeated activity.
There used to be a cinema on this corner.

The cinema existed there in the past but does not exist there now.