I Hate Being So Negative

I know I usually post things here in a very negative fashion and I really don't like that because anyone scrolling through my profile would think negatively of my character, and it's not this negative person. All of my stress and anger just pent up until I need some outlet to let it out and I'd rather use this site as a diary or something as opposed to doing.............well, whatever else I may possibly and subconsciously do that I may regret later. I'm really not a negative, or dark person, I'm just very stressed out and am trying to utilize the healthiest ways of relieving stress. I really don't like portraying myself as this violent, bloodthirsty person, but my anger usually gets the better of me, especially when it's pent up.