I think I'm depressed

I mean I have most of the symptoms:

• Sadness and hopelessness. yes
• Irritability, anger or hostility. too much anger
• Tearfulness of frequent crying. not alot
• Withdrawal from friends and family. yes
• Loss of interest in activities. I do nothing but sleep, eat, watch TV and a little blogging
• Changes in eating and sleeping habits. I sleep for approximately 16 hours a day
• Restlessness and agitation. yes
• Feelings of worthlessness and guilt. yes
• Lack of enthusiasm and motivation. yes
• Fatigue or lack of energy. YES!!
• Difficulty concentrating. yes
• Thoughts of death or suicide. not ALL the time

I got this from a site, and while I was reading I found this...

Suicide warning signs in teenagers:

• Talking or joking about committing suicide.
• Saying things like, “I’d be better off dead,” “I wish I could disappear forever,” or “There’s no way out.”
• Speaking positively about death or romanticizing dying (“If I died, people might love me more”).
• Writing stories and poems about death, dying, or suicide.
• Engaging in reckless behavior or having a lot of accidents resulting in injury.
• Giving away prized possessions.
• Saying goodbye to friends and family as if for good.
• Seeking out weapons, pills, or other ways to kill themselves.

: I know, I so ALL of them but I didn't think it was that serious