Sociopath or not?

From a reader:

Hi, I was wondering if you could give me some kind of answer on whether or not I have sociopathic tendencies? Honestly I'm pretty concerned with my thoughts and emotions and I was hoping you could give me some kind of advice if possible.

I'm a 14 year old female and from a very young age I've been known to be aggressive and both verbally and physically abusive. It has calmed down slightly throughout the years but for a while now I've been having both suicidal and homocidal thoughts. I have no intention with carrying out with the actions but at times they're so overwhelming I get frustrated. I'm no longer in schooling for the moment because of my outbursts and anger, I have no talent for being patient and although I had numerous chances, I was unable to change my behaviour and how I reacted to things. It got to the point where I could barely make it through a whole class.

I've researched the signs and symptoms and I could honestly relate to some. I'm going to point a few things out which I lack and if its decided that they're one of the primary traits of being one, it'll make the rest of this email irrelevant. 

"Animal cruelty" is beyond what I could do. If I were in a situation where I could either choose a human or a dog to live, It'd be the dog all the way. I don't take much interest in animals and it doesn't bother me that most die but there are around 3-4 certain animals I couldn't tolerate dying. I'm rather fond when it comes to the common house pet. With all of that said I still wouldn't mind slaughtering something, maybe even dissecting.

"Lack of empathy", I'd be lying if I said a severe lack of it. I'm to the point where I'm not exactly sure if I lack it or not. I care about my family and would do anything to attempt to prevent danger but I'm not too sure if its love. I recently attended my nan's funeral, of course my eyes got watery but I couldn't cry. I wanted to, I really did considering I looked like a heartless bitch but I couldn't. Over the last two years I've been gradually losing it. 

I believe I'm quite smart, I'm able to spot things that most people couldn't. I've been told numerous times that I'm manipulative but not as straight forward as that. I could change someones opinion within minutes of talking to him/her. Sometimes I get so caught up with thinking about myself that I over see reality and wonder if I'm enabled to some kind of supernatural ability, I believe that I could do many things, anything I want to do. 

I'm just going to run over some things that would possibly be needed to judge and provide your opinion. In the past I've done drugs and have drank alcohol, well whenever I go out. I'm really anti-social, I can't stand being around others for more than an hour at most. The first time I smoked was to try it out, the second time was an attempt to calm down and since I've been smoking. Sometimes I enjoy laying in bed and thinking of ways to end people, to end myself. I've made plans in my head that I couldn't follow through with. Honestly, I'd love to follow through with them but there's things that stop me. Simple things like the outcome of it, wasting away in a cell where I couldn't fulfil my ambitions and become something better then everyone else. I couldn't do it for simple things like that, including what my family would go through because of me.

My old school suggested that I have ADHD, the one after suggested I had some kind of severe anger problem. I often get irritated and angry and when I do I say things that I wouldn't normally say, I take my frustration out on walls and objects in the house and when at my worse I'd lash out without even thinking. 

I'm not too sure what else to say or if you even took time to read this but if you did, thank-you.