bipolar wants divorce after 9 years

We moved to Spain this year. He went first for three months to sort out work and me and the children went in July. We came back to the UK in Oct and collected all our stuff and moved to a very small place back in Spain. Husband started going funny, very distant and wouldnt talk about Christmas, said he was never going back to our home in England. Said he had thoughts in his head, was getting up at 5am washing the car, was shaking and said he was very tired. I had then to return to the UK to bring one of our sons back and he cried when we left. He phoned me on the first day travelling then nothing. Next day whilst driving he phoned to say he wanted a separation and now its divorce. He will not talk to me and has blocked my emails. He has a female friend he met before we went over and we found him there on his birthday when he had voices in his head, but he was furious when I asked if he was having an affair. He said when he finished me he was a new man, not taking crap anymore and going to enjoy his life and go out with his female friend every night. Our new life has finished before it began - I had to bring the children back to England and here we are now. I cant eat or sleep. I dont know if this is him talking or the bipolar, or how long this will last. I cant even talk to him. He used to phone for 2 hours every night when he was in Spain on his own and now nothing. He also had an episode 2 months ago when we came home to fiond hoim drunk (he never drinks) and had cut all his arms with a knife. Can anyone out there please help