My bf doesn't know about my mental health ie my bipolar diagnosis. I've figured I'll tell him when I have a depressive or manic episode. We've been dating for 4 months and as far as my mood swing due to bipolar goes I'm stable despite the hell in going through with my ex.

So personally, I believe due to what you're going through, the time is right to speak up. But consider how much or exactly what it is that you wish to disclose which is a personal choice. I'm not going to tell my bf about my first and only psychotic trip to the psych ward over a year ago. Because I was stupid and went off my meds and didn't see my psychiatrist, which is something I have learned from experience that I'll never do again.