Sadly we often lash out the worst at those we love the most. It's a very confusing, frustrating and disorienting time for someone the first few months of getting sober. Part is physical as the body chemistry adjusts to a radically different chemical balance. Another is psychological as the mind searches for equilibrium and has to relearn how to cope, react and live.
The best things is be as patient as you can, give him some space and try to talk to him. When you do, don't make him feel like he's under attack; frame is as concerned and loving, and ask how you can help him help your relationship. I want to stress that it's not your fault!
You may want to check out the friends and family section of SR, too.
