If so, I might be too xD Of course, I know my uncle is. He's a gemini, so it's "normal" It's just weird to see him happy and then punching the wall and screaming at the air conditioner... o.o
Everyone's gonna think that they are because we're teenagers and we constantly have mood swings. It's only worth being diagnosed when you're a risk to the people around you. A ton of bipolar people have violent outbursts, and some are involved in murders, rapes, etc.
Don't self-diagnose yourself, that's never the answer. If you're really worried you may have be Bipolar, you need to see a doctor and be diagnosed by a professioal. Just because symptoms may seem to match doesn't mean it's accurate.
I don't know where you got all your fact from but you should ask a Doctor about this if you think you're Bi-poler you may have a lot of the symptoms but it could be something else completly that just seems like its what you think it is..
Or look it up on another site because teh facts you have listed here arnt fully righ specially when it comes to being Manic that can either be an intenss hyperness and happyness. or it can be intens depresion.
Manic goes both way and it isnt a pretty feeling to have or pretty to see when some one is starting to feel manic that you know because you can see a normally good mood person go in to a deep depresion at the flip of a switch not only does it suck when its you its happaning to and all you wanna do is shove the world away but it isn't so great to see a friend go through it either