I'm hoping the writers have done their research and that Steve is currently on a downward spiral which will worsen significantly (not that I want to see Steve suffering, I just want the portrayal to be true to life). Steve currently can't cope with stress and is running away from his responsibilities, but things are likely to worsen for him. Let's hope Steve's illness progresses realistically. The last thing real sufferers need is it being shown as something than can be snapped out of with a little willpower.
I also don't like the way Steve is being portrayed as lazy when he runs two businesses! Michelle's party planning sideline is brand new but you'd think she'd been running it single-handedly for years the way she was going on last night. I can't blame Steve from running away from Michelle, who seems to be either mocking him or playing the martyr.
I've got no sympathy for Michelle as she's making Steve's change of personality all about her, which isn't an appealing characteristic. I do have plenty of sympathy with people dealing with loved ones' mental health problems in real life though. It's tough for everyone involved.