I'm going to second what possibility said. Bipolar depression is a very different animal from standard clinical depression. Mania is ugly, it turns someone you know into someone you don't.
Until recently we were living with a maniac who didn't need SSRIs to go manic. It is astonishing how ugly it gets, I've still got a broken mirror on the floor in the other room that we haven't cleaned up yet.
Bipolar depression rapidly gives way to mania if you try to treat it like unipolar depression with standard antidepressants. The chances of this happening are greatly increased if you've never been diagnosed as bipolar. It happened to someone I know, and it was pretty ugly. The jackass behavior is an unfortunate part of the medical condition. It's common for the shame felt after coming down from a manic episode to throw you right back into depression. You can search for "ssri mania" if you want to learn more, it's a well-known phenomenon.