Bipolar=Manic Depression.

To me, it sounds like BipolarII since you are depressed most of the time.

Have you had any mania=elavated mood, feeling of eurphoria, pressured speech, unable to sit down, spending sprees with money you don't have, or irritability, agitation which=Dysphoric Mania?

You have to have at least one episode of hypomania or mania to be classified as Bipolar I believe.