Fixation on a Single Idea

Hey guys,
So today I wanted to talk about something I'm sure a lot of writers face. Writers block. It's not only that for me though, it's my fixation on a single story idea I've had since I was, FOURTEEN! I've written 200 pages of a novel which I'm not happy with. I've tried to scrape it back, to materialize something out of it, to try and craft anything. It's almost impossible when I can't shake the idea of the original book.
I know who I want to focus on, I know what I want that character to be, you could almost say that character is my sole focus. I want them to be in this new constructed story, which is proving to be my sticking point. I can't create a new world for this character, when he is so engrained in the old one.  I'm trying to do the creative writer thing; reading more to try and broaden my horizons, to no avail. I think what I really need to do is dig out my old course books. Flick through 'Writing Down the Bones', and other quintessential writing textbooks.
Writing is no easy task when you hear your character screaming to be placed in some context.
I also have the difficultly of loving several stories all at once, I have three on my mind. Those include the character I'm so longing to place in some context. All three stories are so vastly different, two are sci-fi, one is a realistic longing. All three are men of the same age. All are men with a variety of struggles.
I would love to write a post about why I love writing in the male persona, but I don't even think I can answer that! I think part of it is because I detach from my own sex, I carve a new figure from my mind with my own emotions and feelings. Writing is perhaps the most complex thing to come from the imagination.
Anyway, back to my main sticking point. I think the easiest thing to do, is to strip away all the existing characters, all story. Simply just start again. Use a piece of paper to assemble who this character is, take it right back to basics. Assemble all the things I want him to be, what he looks like, everything. Then I hope I'll have a concrete idea of character, and can work around that, using creative writing books as suggested earlier. I think this is the only way around such complex difficulties, strip everything away and start afresh.
Love,

Gracie xxx