I agree with what everyone here has said. I think you know what you have to do. Look at your manic behavior versus how you are on the little bit of Seroquel you took.

What struck me was your partner's attitude. Positive thoughts go a long way toward helping someone, no doubt, but your partner needs to understand that bipolar disorder is (mostly) the result of faulty brain chemistry. It's not like you can put on a happy face and remain calm and the BP will just go away. It sounds like your partner wants to be supportive, and that's great. There are all sorts of people on this forum who really wish they had someone who was so supportive. Maybe you can get some literature or find some websites that will help your partner understand the disorder better.

I hope you get stable again. Cheers.