What is the difference between borderline personality disorder and bipolar?

Hi Heather. I have BPD and I honestly don't think there is any difference between them. I can relate a lot to what you said because I went through the same scenario with my ex. The amount of times I split up with him and got back with him again was ridiculous. One minute I'll be happy, loving, caring and planning my future with him and the next I can be in tears, regretting everything and going against everything I said. It is extremely difficult to control thoughts most of the time and the worst thing about it is we hurt the ones we love most without even realizing. It's a vicious circle but it can be treated with medication. The best idea is to get him to see a doctor about it in the best time of the month when he isn't feeling so negative. Hope this was at least a tiny bit of help. Take care, hope everything works out for you both... M x