agony aunt

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A writer of an advice column in a newspaper or other periodical.
• noun Someone who people commonly go to for advice about personal problems, often annoyingly so.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a newspaper columnist who answers questions and offers advice on personal problems to people who write in