depression is a component of bipolar disorder and you can't just get over it. I HATE when people say "get over it" or "cheer up". Don't you think if I had the choice it'd do so. Being Bipolar means that your body crosses for you.
Many different things can cause depression and each leaves its own mark; understand that you are human and need to address the things that happen to you in order to maintain a healthy state of mind. Life throws all kinds of things at