I don't think it was a bad idea to tell him. I understand that he probably doesn't know too much about bipolar and maybe it scares the heck out of him. But hopefully he'll understand that bipolar doesn't define who you are. With his relative not being on meds for bipolar, I'm guessing he's probably thinking this is just awful. Maybe try to explain to him that it's something you deal with, and sometimes you may have a hard time with it, but it's not all that you're about. Hopefully he'll be content with that? I hope you are able to work this out since you like him so well and you 2 have such good times together.