The proverbial saying ‘A problem shared is a problem halved’ expresses the idea that, when in difficulties it is useful to talk to someone about them.

Unlike the similarly worded ‘a penny saved is a penny earned’, the proverb ‘a problem shared is a problem halved’ isn’t especially old. The first use of it that I can find in print is in the English newspaper The Morecambe Guardian, November 1931:

If she is married she still has the same problem [money worries] – though it is a happier one for, after all, a problem shared is a problem halved, and, at least, she has someone with whom to talk matters over.