I have. Last March, I met a girl when I was very manic. I thought she as "the one". She fell for me pretty quickly and before we knew it, we were planning a future together. She fell pregnant a few months later just as I hit a pretty bad depressive episode. It was then I realised I wasn't in love at all. I was pretty horrified by my behaviour, which added to my depression. She lost the baby, which in a way was a blessing. We broke up shortly after. I deeply regret this, she was very much an innocent partner, she got dragged in by my manic state. I try to be more cautious but I fear the same could happen again.