It is absolutely not wrong for you to open your own account. You need to be protecting yourself, and in this day and age, that is a pretty basic step in doing that. Whats wrong is him spending your money when he has a paycheck coming in!
Do you like to exercise? I found that really helped me. And I could go to the beach and get out of the house into the sun for free.
I think that I read that you just moved to where you are pretty recently, is that right? Do you still talk to your friends from the old duty station? I think that finding a way for you to expand your social support system is going to be really important now. Do you go to church? Could you volunteer somewhere? There are lots of free ways that you can meet people and get out of the house! Have you thought about going to school? There are lots of grants out there, so you could probably do it pretty reasonably, and theres daycare assistance for moms in school.
Are there any clubs that you can join, Im sure that if you are on any kind of sizeable base there are things that you can do there. Maybe start going to the gym there? The chemicals that your brain makes when you exercise are good for your mood, not to mention whipping that body into shape so you feel sexy is good for your mood too!
Its not how difficult the things that we face are that break us, but how we cope with them.
I guess I gave the wrong finger to the wrong man...