mixed state bipolar symptoms

Anyone out there being treated for manic depression?
I have written on this site regarding a friends son who’s been suffering from manic depression about l5 years possibly(Bipolar)he has all the symptoms.His depressive states are getting longer,he has cut himself off from his family saying he just wants to be alone and doesn’t want to talk to anyone.He has suicidal thoughts all the time and says,every day he wakes up feeling empty and in hell.He has rejected anti-depressants,says they do nothing(but has only taken them for a few days).He has no self worth,can’t mix with people.Was recently emotionally slaughtered in a relationship which has completely wiped out any self esteem he may have built up.Anyone out there who can tell us what to do next.He can’t see any help out there.His parents are so desperate,sectioning him is being considered,as he won’t go willingly for help and they fear for his safety.Anyone been there,what happened to you and how did you get help.They don’t want to section him but don’t know what else to do.
I have been treated for manic depression for over 10years now, I have just been put on anti-depressants for the umpteenth time, I also felt like there was no light at the end of the tunnel. Tell your friend’s son that if he wants to talk to someone who won’t try to ’shink’ him then he can email me. I had the councelling a couple of times and didn’t find it that helpful, but I have a great support network at home.
All your friends have to do is be there for him when he finds a way through the darkness inside. He needs understanding not sectioning, I do understand that it would be a last resort but they should think very long and hard about.
I know it is hard on your friends and they should also try and find someone they can talk to so they find a way to help him and to cope with all the possible outcomes.
Good Luck with everything and I hope he finds a way through the darkness.
Update After Doctor Visit