прекращать отношения(chiefly US; to end a relationship: The band parted ways after releasing their third album; often + with: She has since parted ways with the organizationTaras)
разойтись каждый в свою сторону(to go in different directions: The two friends parted ways at the intersection. – На перекрёстке друзья разошлись каждый в свою сторону.4uzhoj)
расстаться с(As one might expect, this all began to take a toll on Eric's marriage and so he decided that it was time to part ways with the new boss. ART Vancouver)