Being someone who was diagnosed with bipolar, I can tell you that you should never take anything she does personal.  It's something that we can't control.  I take medication and it improves it quite a bit.  I would suggest reading about the disorder and it will help you understand why she does what she does and give you some ideas on how to deal with it.  There's plenty of information on the net about it.  If it still doesn't improve, you may want to look for another job.  Depending on your situation, you may be able to talk to her about it, but usually you risk losing your job or the situation worsening if you do, it just depends.

As for the boyfriend situation, again it depends on your situation. If you've only been with your boyfriend a short time, then I say just ask yourself if he treats you well and if so, be patient.  If you've been with him a while, you need to take a deeper look.  You deserve to be with someone who loves you and you shouldn't settle for less.  Don't stay with him just to be with someone.

There are some things you can do in the meantime to help you with your feelings of depression.  Make sure you take time for yourself, relax and listen to some soothing music, light some candles.  Do things you like to do, whether it be reading, crossword puzzles, surfing the net, whatever.

No matter what, keep your head up!