I have not read the reply's but I wanted to say... I am the wife of a bipolar husband.
I am NOT saying this is your case but I wanted to throw it out there... being the spouse of someone with bipolar disorder is 90% of the time, being on a roller coaster you didn't choose to be on. Its HARD. Its hard to be the person suffering and I take NOTHING at all away from anyone who suffers with this disorder, but I know first hand how the spouse is the one always picking up the pieces, living each day not knowing what kind of mood your spouse is going to be in....waiting for the shoe to drop. One day you thinking I can't do this anymore, I love you but it feels like abuse, to the next day everything being great and wondering what was so bad yesterday.... (This is medicated...unmedicated is sometimes unbearable).
I know you were diagnosed about a year ago, but i am sure you were suffering for a long time before that. I wish there was a way to show people exactly what it is like to be the spouse.... its watching someone you love suffer, one day so sad they feel their life is worthless, to so joyous they spent the mortgage money on something stupid.... (These are the extremes).
Your weight loss might just be something tangeable for him to grab on to. Something to blame. If you think you can make it work, if you even want to.... ask your husband to go with you to councelling... (I know, I know) but spouses often get left in the dust to clean up and there is little in the form of help for the spouse.... I wonder if he has just been suffering along with you for so long he is used to being your caretaker... and now you are likely high on your weightloss and feeling good and out doing things, being things you have not been able to do and he may just feel very lost..
Again this might not be YOUR situation at all. I just really wanted to suggest that if any of it rings a bell or feels maybe partially true you might be able to salvage your marriage... and if not... It will all still be ok. You will move on and so will he and the life that is meant for you is within your reach!
Hugs!
Juls