Fracquaintance (n) a person you see often enough that she/he is more than an acquaintance, but not often enough to be called a friend.
Frintimate (n) (alternate sp. frientimate) a person with whom you share your greatest joys, deepest sorrows, and darkest secrets. (Never used for family members, counselors, pastors etc.)
Frolerate (v) Passive behavior in the presence of a person you do not like who is a friend of one of your friends.
SOURCE jmp Dec 2014