I think I understand. There is something of what you describe here that resonates with my own past experience.
I myself was always much smarter than my peers; this isolated me, as I grew contemptuous of the weakness I found in others, an emotion I often found difficult to hide. At the same time, though, I was not perfect; the ease at which I was able to do many things led me to insufficient conscientiousness, and the usual failures arising from such. These failures would lead to bitter cycles of guilt and self-loathing, as I found the weakness I so hated in others exposed within myself.
Like you, I've found myself becoming more functional over time, as my time in university gives me a chance to repair my own flaws. Even so, it's hard, and not entirely something I've been able to do on my own... I wouldn't have been able to come this far without having sought, and received, help. If you're anything like me, you don't want to seek help directly; that would be admitting weakness, and at the times when you hurt the worst, you'd rather do anything, rather hurt yourself, rather die than admit to your weakness, to allow others to see how flawed you are.
But ignoring your problems doesn't make them go away. You need to do something about them. There are people out there who are willing to help you, but they can't do so unless you make the first move. You need to take the initiative in seeking help; and though it will seem like the hardest thing you could do... it's worth it.
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A list of some posts that are pretty awesome
I recommend the major sequences to everybody, but I realize how daunting they look at first. So for purposes of immediate gratification, the following posts are particularly interesting/illuminating/provocative and don't require any previous reading:
More suggestions are welcome! Or just check out the top-rated posts from the history of Less Wrong. Most posts at +50 or more are well worth your time.
Welcome to Less Wrong, and we look forward to hearing from you throughout the site.