Coming from the same dark place you have, I can most certainly tell you that you´re wrong. You are NOT a pathetic leech, I too was told that I could be whatever I wanted but I had to work hard and give it my all to achive what I wanted, yet many countless others would always tell me that I wasn´t worth it, even my RELATIVES but I wished to prove them wrong, that I was just like them, better even and I hung unto that idea: "I can be whatever I want and I WILL be", so instead of moping around I gave it my all in everything I did, my parents weren´t the most supportive in my decisions to say the least and yet I gave it my all always, I didn´t sacrifice any friendships or opportunities, instead i held unto them and used them right away . At my current age of 19 I ensured a carrer in medicine, I have a lot strong bonds and long lasting friendships but they didn´t just come to me, at first I had to work on myself to be able to show my potential to others, then some years later opportunities just presented themselves and of course I took them. Many people just got jealous and started saying that I was just a gifted individual, but the truth is that I´m not but I let them belive what they want. So if could make a life just by believing in me, why can´t you do it? the answer is: because you AREN´T trying hard enough. you need to find the drive you need, a resolve. ANYONE has the potential to overcome such walls in life, if you want to break them down well that´s up to you. I could continue but it would take up to much space. I know you don´t know me and I don´t know you but if you need help getting this off your mind, PM me and I can listen to you, maybe I can offer you helpful advice.
P.S. if it makes you feel lucky, I also got beaten up and tormented daily by a lot of people, won´t say who they were but I still overcame my problems.