i think your husband does love you, but he thinks he is incapable

 of having a relationship because of his bipolar. He may think

 you dont understand him, or he s not good enough.  as he isnt

 looking for anyone else.   i feel the same as him,  my boyfriend

 doesnt understand me when my moods swing,  but since you

 sound confused, have you ever thought of studying bipolar

 you could do that right here on the net under google. you have

 patience, and that s good.  Remember if he goes into a

 depression, its not your fault,  its just a symptom of bipolar.

  maybe his symptoms got worse, and he just cant handle a

 relationship anymore.  Best thing to do to, is to continue to

 be a friend.