Not in the U.S. But there are "Internet helplines" in many EU countries, Australia and New Zealand. The model for this social media helpline is the UK's very successful Online Safety Helpline for Professionals who work with youth.
This Helpline – with its relationships with US-based social media companies and helplines around the world – will also meet an international need. It will be part of a new and growing global network of help services for social media users in every time zone on the planet.