He uses his friendship with Stacey so that he can get access to his mother's test questions.

But you lied to me, used our friendship.

Some people find that it's asking a lot of them to actually use their friendship as a part of their work.

He knew exactly how she felt about this outing, yet he'd purposely used the girls' friendship to orchestrate their evening together.

You used your friendship to force him to lie!

He evidently wants to see you because he is afraid of using my friendship to his advantage.

In fact, he had used his friendship with King Louis to secure a virtual monopoly on the public performance of stage music.

He joins their gang as well using their friendship.

He could be using his wife's friendship as an excuse.

In effect, both of them use their friendship to fulfill their respective social responsibilities.