I know this might be a bit hard for you, and that's of course why you posted here. What exactly makes you think that you're going down the road to being a sociopath, for one? Like... any symptoms/ways of thinking/etc.?

Any way, you have two main ways you can deal with this:

• One: Go to a psychologist and/or doctor and get evaluated. Let them know everything that is going on with you, and explain in depth what's the matter. You'll also be given feedback and told what the best way to possibly handle this situation. Whether it be getting treatment or just medicine, who knows.
  
• Two: If you're afraid to go to a doctor for whatever reason it may be, never hesitate to tell someone close to you. They love you for you, and want the best situation and outcome for you as a person. They'll be there as support and help you through some tough times; as well as, just being there if you need someone to take your mind off things.
  

I love using what I know people feel insecure about and using it to hurt them.  I get this thrill.  I love helping people too, but that's starting to lose its fulfillment.

I guess the thing holding me back from it is when I do something fucked up to a friend.  GUILT.  But if I do know them and they do something fucked up to me, I use what they trusted telling me against them.

Okay, I'm a 15-year-old guy.  My mom is good enough to put me in therapy.  But what the hell am I gonna tell her?  "Hey, Mom, guess what?  I love making people run away crying!"
Plus my best friend, the only person I can talk to has problems of his own, the main one not caring about anybody else.  There's no way he'll listen.  I could give it a shot though.

For example: in the movie Girl, Interrupted (I'm assuming you saw it or read the book maybe), Lisa gets that girl (I can't remember the name, not Susanna, I'll call her X) to let her stay at her house in exchange for Valium.  She stays over, and when X is on the stairs, Lisa preaches on to her about how her dad fucks her and how no one knows that X likes it.  She goes on about how pathetic she is for cutting herself and the whole 'having the courage to press down' speech.
Well she finished with the part about her dad.
And the next day, not Lisa nor Susanna hears a peep out of X, Susanna goes upstairs and doesn't see her in her room.  She sees the cat clawing at the door to the bathroom, she opens the door to find X hung dead.  Susanna starts crying, and Lisa walks in, says X is an idiot, walks up to X and takes her money.  She had been after the money the whole time, she just didn't see that.  She needed that for her and Susanna to go to Florida.
Well my point is that that scene made me giggle.

And it's NOT hard for me, it's way too easy, THAT'S why I'm posting.

Honestly, while you say your mom would put you in therapy, it's never going to be that easy. Rather than just approaching her and saying that you need to somewhat open up communication and tell her in a roundabout way. It all depends on how well the connection between you and her are. Some people tend to pick up on the fact that there might be an issue, others don't really know what to say. Just start talking about one thing, drift into another, and next thing you know you might be spilling all of your problems which you have out on her. She will love you nonetheless, and seriously just want to get you some help.

As for your friend, sure we all have our fair share of problems. Try making this known to him, try showing him that you need someone to care, and that someone needs to be him. Deep down we all know right from wrong, and we all know when there is a problem. If he was truly your friend this would be easy. No friend just doesn't care. Just try to give him another chance, and set a serious tone at it.

Okay, okay. Honestly, I did somewhat laugh at that. Why? Not because there is anything to wrong with me, but the fact being that that isn't real. While shit like that happens, if it were to happen face-to-face with you, chances are you might get a little more upset then if you were to read about it. You still have your conscious and you still experience guilt. Yea, that might have been sadistic for us both to laugh, but hey... it still happened. If you feel like this is overwhelming you, the whole situation, then I do think you need to open up and tell someone. While you may be afraid, it needs to happen. If talking isn't your thing try writing a letter. Just do what betters you in this situation.
~Wayne

As for me helping you, well, I'm here for support and to talk to you. If you want to rant, rant. Talk about something important, go for it. Whatever you want as a person, I'll compromise and try my best to assist.