To be friends with someone is to become friends with them. Sometimes people use the word to describe the act of being friendly to someone.
He tried to be friends with her, but she wasn't interested.
She was friends with everyone, but she never really got to know anyone.
verb
become friends with
1
They befriended the stranger.
2
It is kind to befriend with a stranger.
3
Amicability is required in befriending others.
4
It is not easy but meaningful to befriend others.
5
She befriends the poor man.
6
He is the confidant of Holly and befriends Ustane.
7
In loneliness, the monster seeks to befriend the De Laceys.
8
The protagonists befriend Petra, the heir to the Minean throne.
9
Ultimately, it's the humans that the Autobots befriend that save the day.
10
Pam is determined to befriend one child by the end of the day.