Jamieson, Fausset and Brown on Micah 7:5

5. Trust ye not in a friend--Faith is kept nowhere: all to a man are treacherous (Jr 9:2-6). When justice is perverted by the great, faith nowhere is safe. So, in gospel times of persecution, "a man's foes are they of his own household" (Mt 10:35, 36; Lu 12:53).

guide--a counsellor [Calvin] able to help and advise (compare Psa 118:8, 9; 146:3). The head of your family, to whom all the members of the family would naturally repair in emergencies. Similarly the Hebrew is translated in Jos 22:14 and "chief friends" in Pr 16:28 [Grotius].

her that lieth in thy bosom--thy wife (De 13:6).