It definitely helps to apologize. Also remember that certain mistakes aren't as big as we make them, and most people are forgiving and forgot a lot of the times I've said and done things that were out of character. When I do make big mistakes, I point out to people where I went wrong and work on showing them through my actions that I'm truly sorry and do not intend to make the same mistake.

It is up to you whether you would like to tell them if you have Bipolar. In some instances, it has actually helped me to admit to Bipolar, because I'd rather be upfront. Sometimes I approach it in a way that if others judge, it is not my fault. Another approach is to just give a generalization such as by telling them, "I was not feeling like myself" or "I had a lot going on, and I was not in the right mindset." Of course, I don't know exactly what you've done during mania in your situation, but I hope some of this helps. If you do not want to tell people that you have BP though, do not feel obligated.