Hey, dark heart. I'm not SPD as far as I know, just bipolar--but we've got quite a bit in common. Only child, prefer my own company, don't like groups, don't make friends easily (not all that interested), disconnected from people/society to some extent. Maybe a major extent.
So yeah, you've got company here. I hope you find the same sort of support I have, & if I can help any with the settling-in process just say so. Or if you don't want to ask for help, visit my page. I'll catch on <grin>.