Dealing with a husband with depression and anxiety (possibly bipolar)

I’m after a bit of advice, and possibly would like to hear from those that have been in a similar situation. My husband was diagnosed with depression and generalized anxiety disorder a few years ago, his moods fluctuate and he seems to get depressed every couple of weeks now, he said he gets anxiety every day. He drinks to drown his sorrows, and has admitted that he has a drinking problem. Unfortunately his opinion of his drinking problem changes according to his mood at the time, sometimes he says he wants to stop drinking, other times he says he’s fine the way he is, he won’t seek help from AA and we can’t afford rehab. He doesn’t drink at night but drinks during the day, on lunch breaks and straight after work, and hides it. He sees psychologists and psychiatrists but his psychiatrist just hands over scripts for anti depressants, sleeping tablets, anxiety meds. He has been given advice to exercise and keep himself busy, but he won’t. I have bought him well-being journals, encouraged him to come with me for a walk at night, go for a swim, I never get anywhere, he pretty much always says no. Now he has lost his job, he was taking so much time off work that his employer terminated his employment which means he is now jobless, it also means we are struggling to make ends meat. I get home from work some nights and he is lying on the bed, and everything is a massive chore for him. We have 3 kids together and they are growing up thinking it’s normal behavior. I feel like I can’t go on anymore with him, it’s all too hard. I’m always made out to be the bad guy, the nagger, the whinger. I just don’t know what to do anymore... I’m really stuck... you can lead a horse to water but you can’t make it drink. Can anyone help?