This is an organisation associated with the Samaritans, and supported by the WHO. The above numbers came from a link from the UK Samaritans site, (although I don't know whether they would be able to offer immediate support in English)
You might like to look into joining the organisation as a helper, in which case this is a good place to start.
Thank you Charles for opening this new thread. From the thread where this information was asked for by Nardini -
I suggested [url=http://www.telefonoamico.it/]Telefono Amico Italia[/url] from [url=http://www.ifotes.org/welcome.html]IFOTES - Welcome[/url]