I find myself going through much the same thing. Though, my substance abuse started with pills and escilated to marijuana (which actually turned into more of specialized intrest than anything) and occasionally drinking, and even more occasionally exstacy. I, too, have done lots of research only to find that I fit about 95% of Asperger's symptoms, and I had a brother who died when I was five who had Prader Willie Syndrome with severe autistic traits. My substance abuse, for me, gives me the chance to really break down the social barriers that (supposedly, as I have not been diagnosed) Asperger's brings. Especially marijuana and exstacy. I don't think it is ever too late to seek support for autisim-like disorders. If your really willing, there are always ways to improve. Even if it means better heightening the things you are already good at. Because of my brother's severe disabilities, my mother also either never noticed or ignored the signs that I showed as a child. You are not alone, my friend!