The first thing I would say is to take everything that is posted here with a grain of salt. At best we have a very small and limited snap shot into your life and any solution that we give will be limited by this.
With that being said, there is nothing new under the sun. While you may see yourself as a special snowflake, your problems are not unique. Numerous women (and men) go through these same issues. Your problems in dating aren't even that complicated. Your entire life you have only dealt with men who have a sky high sexual market value. The tall, handsome, smooth talking brother who has a lot of options. The problem that you've run into (if you want to call it that) is that men are biologically programmed to get with as many girls as possible (And miss me with the moralizing bull shyt. Yes there may be high value men who don't do this, but that stems not from a lack of desire but rather the fact that there is something else controlling their actions i.e. Religion, GF, Wife, public perception).
This is why so many woman talk about how they use to go after the "bad" boy, but then they grew up (it hurt enough) and settled for a good guy. From my perspective as a male, however, it is less about there being bad boys (guys who hurt you) and good boys (guys who don't hurt you/care about you) and more about guys that have options and guys that don't have options.
There's an old story that I came across a while back that goes like this.
A man stops and asks an old fella in his chair, "Sir, what's wrong with your dog? He's howling, howling, I could hear him a block away. What's wrong with your dog?" The old man's reply, "He's lyin' on a nail." "Lying on a nail?" the man said, "Lying on a nail?" "Yep" "Then why doesn't he just get up and move? Why doesn't he do something?" The old man's reply - "Well, I guess it just doesn't hurt him enough yet."