drift apart
drift away

They were close friends who'd drifted apart over the years.

The two men did not get along well, and they soon drifted apart.

But we drift apart, and can no longer hear one another.

In recent months, it seemed as if the companies were drifting apart.

Over the years, your relationship has slowly started to drift apart, but you two are still friends.

By the time his big night arrived, they had drifted apart.

But in the last few weeks, since I got here, we've drifted apart.

By 1991, the marriage was in trouble, and the couple had drifted apart.

America was then, as now, drifting apart along class lines.

In time they simply drifted apart; eventually she moved away.