I have the same trouble worrying about how much I'm bothering someone when describing some interest I am obsessing on, more people have similar stuff in their heads than you might realize though! I have found comfort in circles that are happy not to be 'normal' through art/music and other interests.

Everyone has weird aspects, some people just fit in better than others, but I don't think there is anything wrong with being different. But I agree, it can be lonely, maybe you just haven't found the right friends yet? Anyway though, I feel for you and hope it gets less lonely.